To simplify √45 - √20, you can break down the square roots into their factors: √45 = √(9 * 5) = 3√5 √20 = √(4 * 5) = 2√5 Now, substitute these values back into the original expression: 3√5 - 2√5 Combine like terms: (3 - 2)√5 = 1√5 = √5 So, √45 - √20 simplifies to √5.
lmao what I did: I squared everything first (sqrt(45) - sqrt(20))^2 = (sqrt(45))^2 - 2 x sqrt(45) x sqrt(20) + (sqrt(20))^2 = 45 - 60 + 20 = 5 Now sqrt this 5 to get sqrt(5) as answer
To solve the expression $$\sqrt{4}5 - \sqrt{20}$$, follow these steps: 1. **Simplify the Square Roots**: - The square root of 4, $$\sqrt{4}$$, simplifies to 2 because $$2^2 = 4$$. - The square root of 20, $$\sqrt{20}$$, can be simplified by recognizing that 20 can be factored into $$4 \times 5$$, where 4 is a perfect square. Thus, $$\sqrt{20} = \sqrt{4 \times 5} = \sqrt{4}\sqrt{5} = 2\sqrt{5}$$. 2. **Substitute the Simplified Values**: - Replace $$\sqrt{4}$$ with 2 and $$\sqrt{20}$$ with $$2\sqrt{5}$$ in the original expression. This gives us: $$2 \cdot 5 - 2\sqrt{5}$$. 3. **Perform the Arithmetic**: - Multiply 2 by 5 to get 10. So, the expression now is $$10 - 2\sqrt{5}$$. Therefore, the simplified form of the original expression is $$10 - 2\sqrt{5}$$. This solution involves basic principles of simplifying square roots and arithmetic operations, which are foundational concepts in algebra.
Yes. The way it is written, the square root only applies for the 4 and not the 5, therefore it is sqrt(4) and then times 5, which is 10. Subtracting sqrt(20), which is the same as 2*sqrt(5), leads to 10-2sqrt(5) as the correct answer. Hence, answer D is correct, none of the givens. Also I think it is infuriating writing the steps directly behind the answers.
This is not about sqrt(45) - sqrt(20)! The first root is only on the digit 4 - not on the folowing 5. Therefore it's sqrt(4)*5 - sqrt(20). The solution ist 2(5-sqrt(5)) and the Answer ist D.
The roots is only over 4. Therefire it says 5×sqrt(4)=5x2=10. The question was wrong! If you put up math please make sure you ask The question in the right way. It is misleadung!!!!
The fact that this ends right before the best part of the song is mildly infuriating
To simplify √45 - √20, you can break down the square roots into their factors:
√45 = √(9 * 5) = 3√5
√20 = √(4 * 5) = 2√5
Now, substitute these values back into the original expression:
3√5 - 2√5
Combine like terms:
(3 - 2)√5 = 1√5 = √5
So, √45 - √20 simplifies to √5.
Is sqrt(x^2) = +/-x?
√45=3×3×5
√20=2×2×5
Thanks, I dont even need a pen and paper to know it is √5
u read the problem wrong
45-20 =25
25 /5 = root 5
45-20= 25 perfect square (5)simple 🗿
lmao what I did:
I squared everything first
(sqrt(45) - sqrt(20))^2
= (sqrt(45))^2 - 2 x sqrt(45) x sqrt(20) + (sqrt(20))^2
= 45 - 60 + 20
= 5
Now sqrt this 5 to get sqrt(5) as answer
I did the same😂😂😂
Complicou demais amigo, apenas subtrair os números e depois fazer a raiz quadrada 😂
If you subtract them first then you'll get root 25 which equals to 5...and this answer is wrong
Need to do sq rt first the sub.
10 - 2(sqr root 5)
Only the 4 is under square root so it's 2×5.
That was a strange way to get to the answer.
Ok. This one makes sense.
2(5-√5)
We get it, you want these shorts to go really quick, how about adding a couple of seconds at the end ! To better be able to take in .
La. (. a. ). : Raíz cuadrada de. 5 .
Simple √45-√20 = √9-√4 =√5
correct answer
wrong solution
@@jam9339yes 😂 he did direct substraction
U cannot subtract until you root them. Also to get the right answer try to root the numbers up then divide them to get the real answer.
To solve the expression $$\sqrt{4}5 - \sqrt{20}$$, follow these steps:
1. **Simplify the Square Roots**:
- The square root of 4, $$\sqrt{4}$$, simplifies to 2 because $$2^2 = 4$$.
- The square root of 20, $$\sqrt{20}$$, can be simplified by recognizing that 20 can be factored into $$4 \times 5$$, where 4 is a perfect square. Thus, $$\sqrt{20} = \sqrt{4 \times 5} = \sqrt{4}\sqrt{5} = 2\sqrt{5}$$.
2. **Substitute the Simplified Values**:
- Replace $$\sqrt{4}$$ with 2 and $$\sqrt{20}$$ with $$2\sqrt{5}$$ in the original expression. This gives us: $$2 \cdot 5 - 2\sqrt{5}$$.
3. **Perform the Arithmetic**:
- Multiply 2 by 5 to get 10. So, the expression now is $$10 - 2\sqrt{5}$$.
Therefore, the simplified form of the original expression is $$10 - 2\sqrt{5}$$.
This solution involves basic principles of simplifying square roots and arithmetic operations, which are foundational concepts in algebra.
Comments should support latex and markdown.
Be careful! It seems the root only aplies to 4 and not to 45
It could be √4 x 5
Yes. The way it is written, the square root only applies for the 4 and not the 5, therefore it is sqrt(4) and then times 5, which is 10. Subtracting sqrt(20), which is the same as 2*sqrt(5), leads to 10-2sqrt(5) as the correct answer. Hence, answer D is correct, none of the givens.
Also I think it is infuriating writing the steps directly behind the answers.
um hello ela, can i ask you. Why cant we just subtract 45 and 20? since they are in the same square roots.
The square root doesnt go over the 5, so 10-2sqrt(5)
It says sqrt(4)*5 not sqrt(4*5)…
The answer is d).
Maybe it's some printing mistake.
Comment mistake
Bro root only four
√45-√20
3√5-2√5
√5 A ❤
How it's possible explain
After solving this feels like I am a pro in maths 😅😂
I got it right 🎉
J'adore ça
√45-√20=√25=√5*5=√5
Correct 💯
√25 ans 5 thana varum
How, though?
There are so many mistakes in the og comment. Sqrt(45)-sqrt(20) is not sqrt(25), which is also not sqrt(5).
Si quieres aprender más de matemática , física , química y dibujo , sígueme .
Why are you making this tough bruh
A) √5
This is not about sqrt(45) - sqrt(20)! The first root is only on the digit 4 - not on the folowing 5. Therefore it's sqrt(4)*5 - sqrt(20). The solution ist 2(5-sqrt(5)) and the Answer ist D.
idk man. it kinda look like 5 was not included in the radical. It fell short.
Good job
a) (5)^1/2
Write the question well.
Q. √45 - √20
= 3√5 - 2√5
= √5
A.❤😊
Finally, correct answer💯
오오 잼있어요
A)/5
sqrt (4) * 5 != sqrt(9*5)
super 👍
10- 2√5
Partially right
How to substract 3-1 it's common right
Is not sqrt(45) is sqrt(4)*5. 5 is out of the radical
Root 5
5
no it equals a variable which in this case is question mark
A) √5. Harih 🕉.
RQ 45 - RQ 20 = ?
RQ 9.5 - RQ 4.5
RQ 3 elv 2.5 - RQ 2 elv 2.5
3 RQ 5 - 2 RQ 5
RQ 5, opção A)
Did you know Turkish Examination???!!
Root5
Wow! This is amazing! 🤩
The roots is only over 4. Therefire it says 5×sqrt(4)=5x2=10. The question was wrong! If you put up math please make sure you ask The question in the right way. It is misleadung!!!!
√5
9×5 = 45
4×5 = 20
(3-2)√5 =
√5
Opción: A
👍
Good
I like
❤❤❤❤❤ঠিক
La respuesta es raíz cuadrada de 5
5 ^ 1/2
A.
3√5-2√5 =√5
✓45_✓20=25°/2= 5
A. √5
/5
1√5
You don't have to write 1😂
Ye sab questions k liye pen uthane tak ki bhi jarurat nhi Parti 😂😂
+-2sqrt(5)
Faisable rapidement de tête
Ans- root 5
I have doubt
I think 30 quickly
45-20=25ka rut 5
U make 3-2 how it will be 5
Without doing nothing me select √5 🎉😅
6.x-4.x=2.x so √5
В данном примере 5 не находится под корнем.
Верно. Поэтому я написал None.
Actually, it's √4 *5, not √45
Qu. √45 - √20 =
Sol. √9x5 - √4x5
3√5 - 2√5
√5 ans.
A
To simplify 45-20
=25
Square root of 25 is 5
Thnen put 5 in root
=√5
Under root five
7보다 좀작고 4보다 좀 크다 3에서 가장 가까운 루트5
근데 왜^5는 빼기가 안되죠??
3/5 - 2/5 = /5
Option A
Option A is the right answer
Underrood 5
Foooooooo😮
Doesn't require that much if brain. Simply √45 - √20= √25=√5
*of
@@dhruvpatwal2279 How does √25=√5 xD
😲
wrong, sqrrt of 4 is 2 so 2x5 is 10. 10-2sqrrt5
cuz the square root is only on the 4
D
Ye bachon ka sawal UA-cam kids me daal na😅😂😂
If 9×5 and 4×5
A. A
If this comes
√65. - √35
12×5. 7×5
You know five is the answer
I thought it was √4 *5 for a while
✓5
45-20 =√√25 = √5 😅
Aaaaaa
A is right answer
❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤