Find the factors.
y2 + 6y – 135
y2 + 6y – 135
⟹ y2 + 15y – 9y – 135
⟹ y(y + 15) – 9(y + 15)
⟹ (y + 15) (y – 9)
So (y – 9) and (y + 15) are the factor of the given polynomial.
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