Question

factorisation using identities 81x^2 -100y^2 copy me likh ke answer bhejna please or acche handwriting mein​

Answer 1

81 x^ 2 - 100y^ 2

We can factorise this using the identity

a^ 2 - b^ 2 = (a+b) (a-b)

(9x)^2 - (10y)^2

= (9x +10y) (9x - 10y)

Answer 2

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