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

Solution:

According to the question, the values of a = 5 and b = - 3.

Let us simplify the given expression 2(a² + ab) + 3 – ab

In algebra we can add or subtract like terms, but unlike terms cannot be added or subtracted.

= 2(a² + ab) + 3 – ab

= 2a² + ab + 3

Now substituting the given values of a and b in 2a² + ab + 3,

= 2 × 5 × 5 + 5 × (-3) + 3

= 50 - 15 + 3

= 38

☛ Check: NCERT Solutions for Class 7 Maths Chapter 12

Video Solution:

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

NCERT Solutions Class 7 Maths Chapter 12 Exercise 12.3 Question 10

Summary:

Simplifying the expression 2(a² + ab) + 3 - ab when a = 5 and b = -3 we get the value as 38.

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