Find the value of the following polynomial at a = - 2 and b = 3: a² + b² - ab - b² - a²

Solution:

The given polynomial is a² + b² - ab - b² - a²

We have to find the value of the polynomial at a = -2 and b = 3.

a² = (-2)² = 4

ab = -2(3) = -6

b² = (3)² = 9

Now, a² + b² - ab - b² - a² = 4 + 9 - (-6) - 9 -4

= 13 + 6 - 13

= 6

Therefore, a² + b² - ab - b² - a² = 6

☛ Also Check: NCERT Solutions for Class 7 Maths Chapter 12

NCERT Exemplar Class 7 Maths Chapter 10 Problem 66 (h)

Find the value of the following polynomial at a = - 2 and b = 3: a² + b² - ab - b² - a²

Summary:

The value of the polynomial a² + b² - ab - b² - a² at a = -2 and b = 3 is 6

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