Question

Factorise: 81X(X Squared) + 126xy + 49Y (Y squared) using a suitable identity.
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Answer 1

Answer:

(9x²)+(7y²)+2×9x×7y

(9x+7y)²

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Answer 2

Answer:

As per the identity: (a2−b2)=(a+b)(a−b). Here : 9x=a 1=b. Applying the identity to the ...