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प्रश्न
Factorise the following expression.
49y2 + 84yz + 36z2
योग
उत्तर
49y2 + 84yz + 36z2
On writing it as follows:
(7y)2 + 2 × 7y × 6z + (6z)2
Using the identity a2 + 2ab + b2 = (a + b)2
= (7y + 6z)2
= (7y + 6z) (7y + 6z)
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