Mathematics
Simplify the following:
(2x - y + 3)(2x - y - 3)
Expansions
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Answer
(2x - y + 3)(2x - y - 3)
Let (2x - y) = a
Then, the given expression = (a+3)(a-3) = (a)2 - (3)2
= a2 - 9 = (2x-y)2 - 9 = (2x)2 - 2(2x)(y) + y2 - 9
= 4x2 - 4xy + y2 - 9
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