Question

Evalute the following
39sq - 38sq

Answer 1

Answer:

(39²-38²)

using identity a²-b²=(a+b)(a-b)

(39+38)(39-38)

77×1

=77

Answer 2

☀ Solution :

⇏ 39² - 38²

⇏ (39 + 38) (39 - 38)

⇏ 77 × 1

⇏ 77

• Hence, the Answer is 77.

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