Simplify the expression and find its value whena= 5 andb= 3.

2 (a2+ab) + 3 ab

?

 2 (a2 + ab ) + 3ab

= 2a2 + 2ab + 3ab

= 2a2 + 5ab

when a = 5, b = 3, then the value of the given expression becomes

2 (5)2 + 5 × 5 × 3 = 2 × 5 × 5 + 75 = 50 + 75 = 125

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Solution:

2(a2 + ab) + 3ab

= 2 (52 + 5x3) + 3 x 5 x 3

= 2(25 + 15) + 45

= 2 x 40 + 45

= 80 + 45

= 125.

Ans: 125.

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