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Question Number 47068 by 143jesus last updated on 04/Nov/18

(a−b)^2

(a−b)2

Answered by ajfour last updated on 04/Nov/18

= (a−b)(a−b) = a(a−b)−b(a−b) = a^2 −ab−ba+b^2 = a^2 −2ab+b^2 .

=(a−b)(a−b)=a(a−b)−b(a−b)=a2−ab−ba+b2=a2−2ab+b2.

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