Question

2x=15-x2???????????????????????​

Answer 1

Resposta:

$x^{'} = 3\\x^{"} =-5$

Explicação passo-a-passo:

$x^{2} +2x -15\\2^{2} -4.1.(-15)=4+60=\sqrt{64} \\x= \frac{-2+-\sqrt{64} }{2.1} = \frac{-2+-8}{2} \\x^{'} = \frac{-2+8}{2} = 3\\x^{"} = \frac{-2-8}{2} = -5$