Question

X elevado a 2 + 3x - 6 = - 8

Answer 1

x² + 3x - 6 = -8

x² + 3x - 6 + 8 = 0

x² + 6x + 2 = 0


Δ = b²−4ac
Δ = (3)²−4⋅1⋅2
Δ = 9 − 8
Δ = 1



x = -b ± √Δ / 2.a
x = -3 ± √1 / 2.1
x = -3 ± 1 / 2
x' = -3 - 1 / 2
x' = -2 / 2
x' = -1

x'' = -3 - 1 / 2
x'' = -4 / 2
x'' = -2

S = {-1, -2}