Question
How do you factor the trinomial #b^2 - 15b + 56#?
How do you factor the trinomial #b^2 - 15b + 56#?
Answers
Find a pair of factors of
#56# whose sum is#15# , hence:
#b^2-15b+56 = (b-7)(b-8)# Explanation:
Find a pair of factors of
#56# with sum#15# . The pair#7, 8# works:
#7 xx 8 = 56#
#7 + 8 = 15# Hence:
#b^2-15b+56 = (b-7)(b-8)#
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