expand the following (ab-cd) 2
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Answer:
(ab-cd)^2
=(ab)^2-2.ab.cd+(cd)^2
=a^2b^2-2abcd+c^2d^2
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a²+2ab+b²
= (ab)²+ 2 x ab x cd + (cd)²
ab²+2abcd +cd²
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