Question

calcule esssa equaçao do segundo grau 12x²-87x+135=0

Answer 1

Resposta:

$x'=\frac{120}{174}$

$x''=\frac{54}{174}$

Explicação passo-a-passo:

Δ= -b²-4.a.c

Δ=(-87)²-4.12.135

Δ=7569-6480

Δ=1089

Δ=33

x'=$\frac{-b+Δ}{2.a}$

x''=$\frac{-b-Δ}{2.a}$

x'=$\frac{87+33}{174}=\frac{120}{174}$

x''=$\frac{87-33}{174} = \frac{54}{174}$

Answer 2

Resposta:

2.a = 2.12 = 24---> x' 120 / 24 = 5 e x'' = 54 / 24 = 2,25