Question

Solve
${81x}^{2} - 198xy + {121y}^{2}$

Answer 1

Hey!

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Solution -:

81 x^2 - 198 xy + 121 y^2


(9x) ^2 - 2 × 9x × 11y + (11y)^2

We can clearly see that it's identity-1

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

Now, Answer-

= (9x-11y)^2

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Hope it helps...!!!

Answer 2

plz refer to the attachment ↑↑↑

hope this helps..!!