Question

What is the product of
$(a - b) \: and \: (a - b)$
Please tell me quickly​

Answer 1

(a-b)(a-b) { 2nd identity: (a-b)²=a²-2ab+b²)

a²-ab-ab+b²

= a²-2ab+ b²

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Answer 2

(a-b)(a-b)

(a-b)⁽¹⁺¹⁾

(a-b)²=a²⁺2ab-b²