1)13а-13b+15^2-15ab2)42a+30p^2-35ap-36p

Question

1)13а-13b+15^2-15ab2)42a+30p^2-35ap-36p

Answer 1

1) =13*(a-b)+15a*(a-b)=(13+15a)*(a-b)
 2) = 6*(7a-6p)-5p*(7a-6p)=(6-5p)*(7a-6p)