Question

Resolva a equaçao de 2 grau encontrando o valor de suas raizes(x1 e x2)
A)8x2-16x=0

Answer 1

8x²-16x=0
∆=(-16)²-4.8.0
∆=256-0=256
x=16±√256/16
x=16±16/16
x¹=16+16/16= 32/16=2
x²=16-16/16=0

8.2²-16.2=0
8.4-32=0
32-32=0
0=0

Answer 2

8x² - 16x =0
temos: 
x ( 8x -16) =0
logo temos:
x = 0
e 
8x - 16 = 0
8x = 16
x = 16/8
x = 2