expand ( a+2b ) ( a-2b )
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3
Answer:
a(a-2b)+2b(a-2b)
a²-2ab+2ab-4b²
a²-4b²
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Step-by-step explanation:
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Answer
we know (a+b)(a-b) = a²-b²
Therefore,
(a+2b)(a-2b) =》[a²-(2b)²]
=》[a²-4b²]
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