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Question
Factorise the following, using the identity a2 + 2ab + b2 = (a + b)2.
4x2 + 4x + 1
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Solution
We have,
4x2 + 4x + 1
= (2x)2 + 2 × 2x × 1 + 12
= (2x + 1)2
= (2x + 1)(2x + 1)
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