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

Q. 114.3( 80 Votes )

Simplify th

Class 7th NCERT Mathematics 12. Algebraic Expressions

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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