SOLUTION: Not in book. Factor each trinomial. d^2-16d+63 Help please

SOLUTION: Not in book. Factor each trinomial. d^2-16d+63 Help please

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Question 75868: Not in book.
Factor each trinomial.
d^2-16d+63
Help please
Answer by tutorcecilia(2152) (Show Source): You can put this solution on YOUR website!
d^2-16d+63
Factor 63: 7 x 9; 63 x 1
Which factor adds up to -16?
Answer: Factors -7 + (-9). This become the middle term. So,
.
(d-7)(d-9)
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