How do you solve $5x^2+10x-15$ ?

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Answer 1 · 2018-05-26T18:00:03

$x=1$ or $x=-3$

We have
$5x^2+10x-15=0$
Dividing by
$5$
$x^2+2x-5=0$
By the quadratic formula we get
$x_{1,2}=-1pm sqrt(4)$
so
$x=1$
or
$x=-3$

How do you solve 5x^2+10x-155x^2+10x-15?