Question

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Answer 1

13а -13b +15a² -15ab = (13a -13b) +(15a² -15ab)= 13(a-b) +15a(a -b)=

(13 +15a)(a-b)

42a +30p² -35ap -36p =(42a -35ap) +(30p² -36p) = 7a(6-5p) +6p(5p -6)=

7a(6-5p) -6p(6 -5p)= (7a-6p)(6-5p)