Question

A soma das raízes da equação 2x² + 2x - 24 = 0 é *
(_)-1
(_)-2
(_)-7
(_)7
e urgente

Answer 1

$\large\boxed{\boxed{\boxed{{Ol\'a}}}}}$

$2x^2+2x-24$

$x_{1},_{2}=\frac{-b±\sqrt{b^2-4.a.c}}{2.a}$

$x_{1},_{2}=\frac{-2±\sqrt{2^2-4.2.(-24)}}{2.2}$

$x_{1},_{2}=\frac{-2±\sqrt{4+192}}{4}$

$x_{1},_{2}=\frac{-2±\sqrt{196}}{4}$

$x_{1}=\frac{-2+14}{4}$

$x_{1}=\frac{12}{4}$

$x_{1}=3$

$x_{2}=\frac{-2-14}{4}$

$x_{2}=\frac{-16}{4}$

$x_{2}=-4$

Raizes x'=3 e x" = —4.

A sua soma:

X' + x'' = ???

3+(—4) = —1