Germany | Can you solve this? | Math Olympiad

[@tharanathakula3588]

this is also a mental sum.move the the X^2 to the right hand side The equation becomes X^3 = 100 + X^2 the value of 5 satisfies the equation

[@ВладимирКарапетян-г7е]

X=5

[@CelsoantnioPenacamacaro]

Please.solve this ecuacion exponencial:4×^3-4×-4=o.venezuela.

[@yairshahar909]

Funny how during solving then the answer itself is apparent
5^3-5^2= 100
X is 5
Minute 2 of the explanation. So from there everything is just circular back to 5
😉

[@muhammadindrafatihfailasuf]

5 x 5 x 5 = 125 minus 5 x 5 = 100. X is 5

[@orhanselcuk2838]

(5-x).(x^2+4x+20)=0
[(5-x).(x^2+4x+20)] / (x^2+4x+20 ) = 0 / (x^2+4x+20)
(5-x)=0
X=5🙃
👉 0/a = 0 ( a simple mathematical rule)

[@МихайлоЛовга-ф1ц]

Х=5

[@giannaleoci2328]

x^3-x^2=100
x^3-x^2-100=0
x^3-x^2-125+25=0
(x^3-5^3)-(x^2-5^2)=0
(x-5)(x^2+5x+25)-(x-5)(x+5)=0
x-5=0 x=5
x^2+5x+25-x-5=0
x^2+4x+20=0
x=[-4+-rq(16-80]/2 =
[-4+-8i/2
x=-2+-4i x=5

[@randallewebb]

How did you get the 1st part of line 5?