Question

Using identity a^2-b^2=(a+b)(a-b), evaluate-
(62)^2-(38)^2

Answer 1

a² - b² = (a + b) (a - b)

(62)² - (38)² = (62 + 38) (62 - 38)

= (100) (24)

= 2400

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Answer 2

${a}^{2} - {b}^{2} = (a + b)(a - b)$

${62}^{2} - {38}^{2} = (62 + 38)(62 - 38)$

$= 100 \times 24$

$= 2400$