Question

x elevado 2 -3x-10=0

Answer 1

X'= 5
X"=-2


Usa a fórmula de baskara

Answer 2

Δ=$(-3) ^{2}-4.1. (-10)=9+40=49;$ $x= \frac{3+/- \sqrt{49} }{2.1} = \frac{3+/-7}{2} ; x^{'}= \frac{3+7}{2}= \frac{10}{2} =5; x^{"} = \frac{3-7}{2} = \frac{-4}{2} =-2$