Question 776893: 5b2-18b-8
Answer by 1998Baby(63)   (Show Source):
You can put this solution on YOUR website! 5b2-18b-8
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multiply 5 and 8
you get -40.
find two numbers that when added equal -18 and when multiplied equal 40.
the two numbers are -20 and 2
so you put it in this format.
5b^2-20b+2b-8
you factor by grouping next and get
5b(b-4)+2(b-4)
If you did it correctly you should get the same equation in the parenthesis.
than you add the 5b+2 into it
final solution-
(5b+2)(b-4)
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