Question

4(p+q)(3a-b) +6(p+q)(2b-3a)

Answer 1

4(p+q)(3a-b) +6(p+q)(2b-3a)
= 2(p+q) {2(3a-b) + 3(2b-3a)}
= 2(p+q) (6a-2b + 6b-9a)
= 2(p+q)(4b-3a)