Question

-4x^2+8x=0 me ayudan ?
3x^2-18=0
8x^2+7=0

Answer 1

-4x²+8x=0
4x(-x +2)= 0
4x= 0 => x = 0/4 => x=0
-x+2 = 0 => 2=x

3x²-18=0
X²= 18/3
X²= 6
X =± √6

8x²+7=0
8X² = - 7
X²= - 7/8
X = ±√-7/8 números imaginarios