Solve it (a+b) (a-b)
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(a+b)(a-b)
a(a-b)+b(a-b)
a^2-ab+ab-b^2
a^2-b^2
(a+b)(a-b)= a^2-b^2 (This is an identinty)
a(a-b)+b(a-b)
a^2-ab+ab-b^2
a^2-b^2
(a+b)(a-b)= a^2-b^2 (This is an identinty)
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