Question

X2+10x-15=0


Quero saber qual valor

Answer 1

x² + 10x - 15 = 0

Δ = 10² - 4(1)(-15)
Δ = 100 + 60
Δ = 160

$x = \frac{-10~\pm~12,7}{2} \\ \\ x'= \frac{-10~+~12,7}{2} \approx 1,32 \\ \\ x''= \frac{-10~-~12,7}{2} =-11,32$