Question

x ao quadrado- 8x+12=0

Answer 1

x (x - 8) + 12=0
x (x-8)= -12
raizes... x=-12 ou x=8

Answer 2

x² - 8x + 12 = 0
A= 1 B= -8 C= 12
delta= (-8)² - 4.1.12
delta= 64 - 48
delta= 16

$\frac{-(-8) +/- \sqrt{16} }{2}$

$x' = \frac{8 + 4}{2} = \frac{12}{2} = 6$

$x'' = \frac{8 - 4}{2} = \frac{4}{2} = 2$