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प्रश्न
Factorise the following, using the identity a2 + 2ab + b2 = (a + b)2.
x2 + 12x + 36
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उत्तर
We have,
x2 + 12x + 36
= x2 + 2 × 6 × x + 62
= (x + 6)2 ...[∵ a2 + 2ab + b2 = (a + b)2]
= (x + 6)(x + 6)
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