Answer :

To Simplify: 2(a2 + ab) + 3 - ab

2(a2 + ab) + 3 - ab

Opening the brackets we get,

= 2a2 + 2ab + 3 - ab

Taking like terms on one side we get,

= 2a2 + 2ab - ab + 3


= 2a2+ ab + 3


Put a = 5 and b = -3


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


= 2(25) - 15 + 3


= 50 - 12


= 38

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