Evaluate: (729)² - (271)²

Solution:

Given, (729)² - (271)²

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

Here a = 729 and b = 271

(729)² - (271)² = (729 + 271)(729 - 271)

= (1000)(458) = 458000

✦ Try This: Evaluate: (639)² - (261)²

Given, (639)² - (261)²

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

(639)² - (261)² = (639 + 261)(639 - 261)

= (900)(378) = 340200

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

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

Evaluate: (729)² - (271)²

Summary:

Evaluating (729)² - (271)² we get, 458000

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