Solving Algebraic Inequalities
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- Опубліковано 8 лип 2024
- We've seen lots of equations, which are constructs that equate two things, but there are also inequalities, which state that two things are not equal, but rather that one is greater than or less than the other. We can solve this just like equations, but there are one or two little differences that we have to go over. Check it out!
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he do be vibibing in the intro doe
It's been two years for me to study maths but now I have to prepare for entrance exam and this playlist helps me a lot :)
Oh em gee I'm also watching this video while preparing to do an entrance exam!! Did you get in?
“I fear no man, but that thing... Professor Dave... it scares me.”
Lol 😂, Love that meme!
@@f1shy27🤣🤣🤣😂😂
@@Miascorpion I didnt even remember i commented this. wow 2 years ago
@@f1shy27 yeaaaaa time goes very fast((:
the professor dave explains in the intro gives me chills 😂🤣
thanks a lot ive been having a lot of trouble with inequalities and was really stressed out but this vid helped ty
Very helpful! Thanks
Good job in teaching inequalities,👍DAVE
thanks man it really helped .
Last equation has two ways to solve. One way gives you 6
love the intro
thanks❤
a > b = b < a
Dear dave,
Hi.
KipperKlank.
(Oh yeah, you have no idea how fun it is to rediscover all the shit in math I never paid attention to in middle school/high school. Thank you.)
why curse?
are you a christian?
@@aidangreaves7188 Why complain? Are you upset?
@That Multistan I like potatoes and green beans with my roast thanks.
in the last problem why did the sign changed were X
You must do every exercises given in the video to test you that you have learned it properly
How can an positive X be less than an negative number?
OH MY GOD! WHAT IS NOT IN THIS CHANNEL?!
Holy crap I didn't believe it was that simple
Is it okay if you write 3 is less than x for the last equation? Because x was on the right side, that's what I got, and forgot to put x on the left. Since it's still the same answer but written differently, would it be okay? or does x always have to be on the left side?
it's the same
I just did the same thing
@@cmak_1200me also
that intro though.
"NOICE!"
What into?
Hi,
Is it true that any number has decimal point ? If yes how can we prove it ?
Thanks
If there is no decimal point present, it is assumed to be at the very right of the number (ie, 34 is actually 34.0)
Can someone please answer this before I submit or just please answer? How does 3x divided by 3 equal zero?
It doesn't, it equals x.
@@ProfessorDaveExplains thanks
If x= -1 then the answer is zero
If the equation is
(3x-8)/-2 < 5
then
3x-8 > 5 * -2 ?
Yes,
it would be solved like this:
3x-8>5*-2 = 3x-8>-10
3x-8+8 > -10+8 = 3x > -2
x = -2/3
The intro has me shook O_O
What is in the intro?
@@caronfernandes4625 I don't knoww
*Just one question*
Why are we taking (-10) why can't we take positive no. Instead 🤔
In .... *-x > 6* & *x < -6*
because it isn't correct, put the number in and see the result
It certainly is very easy to make mistakes. Practice makes perfect I suppose.
Maybe you just can’t do it
@@justbbricks nah, its all about practice and basic understanding..
Nice
the question 3-x > 17
can also be answered as -x > -14
No it can only be answered in 2 ways one is x14 😊
3x + 2 < 20
3x + 2 - 2 < 20 -2
3x < 18
3x/3 < 18/3
x > 6, shouldn't the symbol be "greater than" because we flip it from doing a division?
No, sign won't be flipped as it is a positive number not a negative number. Remember that " sign gets flipped only when negative number is mulplying or dividing"
I am not getting your last videos
Sir is it allowed to move numbers and variables from left side to the right side in this lesson?
yes. but if you do that, flip the signs:
a > b
is the same thing as
b < a
notice that the sign is flipped.
examples:
x < 5
Also means
5 > x
9 > 3
Also means
3 < 9
@@lanzibangli1259I couldn't get the third one, can you help?
Someone explain the last equation
If 2X + 9 is less than 4X + 3 , then naturally 4X + 3 is greater than 2X + 9.
4X + 3 > 2X + 9 is just a different way to express X + X + X + X + 3 > X + X + 9. We can isolate the 9 by subtracting 2X from both sides. This leaves us with 2X + 3 > 9.
The next step is to cancel out the 3 by subtracting it from both sides. Now we have 2X > 6.
Dividing 2X by 2 gives us X, and dividing 6 by 2 gives us 3.
In conclusion, X > 3.
Embarrassed coming here as a college student
3:54 AM (yep!)
3/29/2022
Can someone explain 2x +9 < 4x +3
Why sign changed
so nice of you..
It's help me a lot
I solved it like this:
2x+9
Letters are math too, Letters have rights, Letters life matters!
got confused why their sign is flipped when the value of x, is just x in comprehension. what did I miss?
When a variable is negative (-x), you'll have to multiple or divide by -1 to get x. When multiplying or dividing negative variables, the sign must be flipped.
Im a bit confused by the last one. I got it right but re-doing the math to add a value to x>3 the whole thing just fails...
Please correct what im doing wrong.
x=2
2(2)+9
Hi Eric.
The result says, but you use
x>3 x=2
That's the mistake, the solution requires it to be bigger than 3, and you're using 2.
I speak Spanish as well, if you need more help, I can gladly help you in Spanish as well
I know it's been several months but let me walk you through how I did it:
If 2X + 9 is less than 4X + 3 , then naturally 4X + 3 is greater than 2X + 9.
4X + 3 > 2X + 9 is just a different way to express X + X + X + X + 3 > X + X + 9. We can isolate the 9 by subtracting 2X from both sides. This leaves us with 2X + 3 > 9.
The next step is to cancel out the 3 by subtracting it from both sides. Now we have 2X > 6.
Dividing 2X by 2 gives us X, and dividing 6 by 2 gives us 3.
In conclusion, X > 3.
I hope this is helpful.
@@a.v.w.6453 thanks man, i really appreciate it.
@@a.v.w.6453 and why not let the 3 as it is and find negative value x -3...... without changing the row of values? i mean SHOULD BE LIKE this: 2x+9>3 why u write it reverse? 2x+3>9 changing the core comparison value...
@@ispeakwhenimallowedto..3582 Another way to get the answer is by subtracting 3 from both sides first, which leaves 2X+6
2x+9
Step 1: Subtract both side with 3.
Step 2: Subtract both side with 2x.
Step 3: Divide both side with 2 and you will get 33(unnecessary step).
@@arpittripathi9472 So, since it is an unnecessary step, why is it there?
@@TheSnowyOwl-zg2ck
a > b
Also means
b < a
3 > 2 means
2 < 3
Usually it doesn't matter, but it's easier to read if the variable is on the left side.
So if you get
3 < x
you can just say
x > 3.
3 is smaller than x
x is bigger than 3
All means the same thing.
Also, notice how equalities don't have this issue:
a = b means b = a
the sign is symmetrical.
@@arpittripathi9472 tysm
x-4>3
x>7
3x+2
3-x>17
x>-14
Sir please explain Transistor and how it work
No.
@@Decco6306 bruh
I love the video it's helping me
Guys can we create a group chat for math and share exercises with each other
exactly!! 😭 coz i need more equations that i could practice on T-T for the first time in my life, i find mathematics fun.🤞🏻
if u made one, pls tell me🙏🏻
*I wish you were my teacher* 🥰
😭 😭 😭 😭
😊😊😊😊😊😊
x > 7 x < 6
x < -14
my dude are you alright
help I didn’t type that
@@justbbricks my dude are you alright
@@silentseashelllistener3818 my girlfriend made me type that
@@justbbricks my ego made me type that
yurr
"x < -14"??? That makes no sense. If x=5 then 5 < -14???
he looks kinda like jesus
you just confused me lol
lmao
Speak slower next time please
You can slow the video
TOO FAST LMAAO CALM DOWN