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Question
Expand : ( 5x - 3y - 2 )2
Sum
Solution
( 5x - 3y - 2 )2 = (5x)2 + (3y)2 + (2)2 - 2(5x)(3y) + 2(3y)(2) - 2(2)(5x)
= 25x2 + 9y2 + 4 - 30xy + 12y - 20x
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Expansion of Formula
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