Question

3.27a+15(b+2)-6b-(2a-3)+12
4.30+10a(a+b-2)-10b(2a-b+3)-5(6+2b kuadrat)

Answer 1

3.27a+15(b+2)-6b-(2a-3)+12= 27a + 15b + 30 - 6b - 2a + 3 + 12
= 27a - 2a + 15b - 6b + 30 + 3 + 12
= 25a + 9b + 45

4.
30+10a(a+b-2)-10b(2a-b+3)-5(6+2b²)
= 30 + 10a² + 10ab - 20a - 20ab + 10b²  - 30b - 30 - 10b²
= 10a² + 10b²  - 10b² + 10ab - 20ab - 20a - 30b + 30 - 30
= 10a² -10ab - 20a - 30b


Maaf, kalau salah.