Question

Simplify the expression and find its value when a = 5 and b = -3. 2(a2 + ab) + 3 – ab

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Answer 1

Answer:

2(a2 + ab) + 3 – ab = 2a2 + 2ab + 3 – ab
= 2a2 + 2ab – ab + 3

= 2ab + ab + 3

Putting, a = 5 and b = -3, we get

= 2(5)2 + (5)(-3) + 3

= 2 × 25 – 15 + 3

= 50 – 15 + 3 = 53 – 15 = 38
Hence, the required value = 38