what two numbers multiply to get -216 and add up to get -15?

A postive and negetative number.
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1 Answer

x+y=-15    or y=-x-15

xy=-216

x*(-x-15)=-216

-x^2 -15x +216=0

or x^2 +15x -216=0

(x-9)*(x+24), so x=9 & -24
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