Question

x²+4x-12=0 equação do 2° grau

Answer 1

Δ=b²-4·a·c
Δ=(4)²-4·1·(-12)
Δ=16+48
Δ=64
X=$\frac{-b+ou- \sqrt{Δ} }{2.a}$
X=$\frac{-4+- \sqrt{64} }{2.1}$
x'=$\frac{-4- \sqrt{64} }{2}$
x'=$\frac{-4-8}{2}$
x'=$\frac{-12}{2}$
x'=-6
x''=$\frac{-4+ \sqrt{64} }{2}$
x''$\frac{-4+8}{2}$
x''=$\frac{4}{2}$
x''=2