Question

X2+3×-40=0
Alguém m ajuda

Answer 1

Resposta:

$x^2+3x-40=0$

$x_{1,\:2}=\frac{-3\pm \sqrt{3^2-4\cdot \:1\cdot \left(-40\right)}}{2\cdot \:1}$

$x_{1,\:2}=\frac{-3\pm \:13}{2\cdot \:1}$

$x_1=\frac{-3+13}{2\cdot \:1},\:x_2=\frac{-3-13}{2\cdot \:1}$

$x=5,\:x=-8$