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Question
In the case find whether the trinomial is a perfect square or not:
4x2 + 4x + 1
Sum
Solution
4x2 + 4x + 1
= (2x)2 + 2 × 2x × 1 + (1)2
=(2x + 1)2 [∵ a2 - 2ab + b2 = (a - b)2]
∴ The given trinomial 4x2 + 4x + 1 is a perfect square.
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Factorising a Perfect Square Trinomial
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