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Mathematics 14 Online
OpenStudy (taepoohwae):

This is my first time factoring a trinomial using reverse in foil method. Could someone please show me by using this problem? 4x+5x-15

OpenStudy (tkhunny):

Factorizations of 4 1*4 2*2 Factorizations of -15 -1*15 -3*5 -15*1 -5*3 That's it. Only 8 combinations to try.

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