Question

Determine f(x)=x2+4x-5 x, tal que f(x)=-8

Answer 1

f(x) = x² + 4x - 5
f(x) = -8

f(x) = x² + 4x - 5
-8 = x² + 4x - 5
x² + 4x = -8 + 5
x² + 4x = -3
x(x + 4) = -3
x = -3

bons estudos!!