How do you find the roots, real and imaginary, of $y=(x+1)(-5x+5)$ using the quadratic formula?

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Answer 1 · 2018-05-26T10:20:12

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

We do not Need the quadratic formula, since we get
$(x+1)(-5x+5)=0$
if $x+1=0$
or
$-5x+5=0$

How do you find the roots, real and imaginary, of y=(x+1)(-5x+5)y=(x+1)(-5x+5) using the quadratic formula?