Evaluate: (98)²

Solution:

Given, (98)² = (100 - 2)²

Using standard identity: (a - b)² = a² - 2ab + b²

Here, a =100 and b = 2

(98)² = (100 - 2)² = (100)² - 2(100)(2) + (2)²

= 10000 - 400 + 4

= 9604

✦ Try This: Evaluate: (58)²

Given, (58)² = (60 - 2)²

Using standard identity: (a - b)² = a² - 2ab + b²

Here, a = 60 and b = 2

(58)² = (60 - 2)² = (60)² - 2(60)(2) + (2)²

= 3600 - 240 + 4 = 3364

☛ Also Check: NCERT Solutions for Class 8 Maths Chapter 9

NCERT Exemplar Class 8 Maths Chapter 7 Problem 86(iv)

Evaluate: (98)²

Summary:

Evaluating (98)² we get, 9604

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