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Question
Simplify the expression and find its value when a = 5 and b = −3.
2 (a2 + ab) + 3 − ab
Sum
Solution
2 (a2 + ab) + 3 − ab
= 2a2 + 2ab + 3 − ab
= 2a2 + 2ab − ab + 3
= 2a2 + ab + 3
= 2 × (5 × 5) + 5 × (−3) + 3
= 50 − 15 + 3
= 38
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