Question

qual e a conta de x^2=x-12=0

Answer 1

$x^{2} + x^{} -12=0$

Δ=b²-4ac

Δ=1+48

Δ=49

√Δ=7

$x'= \frac{-1+7}{2} = \frac{6}{2} =3$

$x"= \frac{-1-7}{2} = \frac{-8}{2} =-4$

S={-4,3}