Question

Simplify the expression and find its value when a = 5 and b = – 3.2(a2+ab)+3 – ab

Answer 1

Given:
2(a2+ab)+3-ab
⇒ 2a2+2ab+3-ab
⇒ 2a2+2ab-ab+3
⇒ 2a2+ab+3
⇒ 2(5)2+(5)(-3)+3
⇒ 2×25-15+3 [putting a=5, b=-3]
⇒ 50-15+3
⇒ 38