Question 680656
Starting from the end and working backward
x = -9
x = -15
...
x + 9 = 0
x + 15 = 0
...
(x+9)(x+15) = 0
{{{x^2 + 15x + 9x + 135}}} = 0
...
{{{highlight_green(P(x)=x^2+24x+135)}}}
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