Math, asked by naijamehra, 9 months ago

7.9^2 - 2.9^2 solve using identities

Answers

Answered by DrNykterstein

40

==> (7.9)² - (2.9)²

==> (7.9 + 2.9)(7.9 - 2.9)

°•° a² - b² = (a + b)(a - b)

==> 10.8 × 5

==> 54

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