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प्रश्न
In the case find whether the trinomial is a perfect square or not:
x2 + 14x + 49
बेरीज
उत्तर
x2 + 14x + 49
= (x)2 + 2 × x × 7 + (7)2
= (x + 7)2 ...[a2 + 2ab + b2 =(a + b)2]
∴ The given trinomial x2 + 14x + 49 is a perfect square.
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Factorising a Perfect Square Trinomial
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