Use the Product (A + B) (A – B) = A2 – B2 to Evaluate: 7.7 X 8.3 - Mathematics

Use the product (a + b) (a – b) = a² – b² to evaluate:
7.7 x 8.3

Sum

7.7 x 8.3 = (8−0.3) (8+0.3)

= (8)²− (0.3)²

= 64 − 0.09

= 63.91

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Product of Sum and Difference of Two Terms

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Chapter 12: Identities - Exercise 12 (A) [Page 150]

Chapter 12 Identities
Exercise 12 (A) | Q 4.5 | Page 150

Evaluate : (a+1) (a-1) (a²+1)

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