Question

49(x+y) ² - 81 (x + 2y)²​

Answer 1

Answer:

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Answer 2

heyya,

49(x+y)²-81(x+2y)²

=7²(x+y)²- 9²(x+2y)²

=(7+x+y)²-(9+x+2y)²

= (49+x²+y²+14x+14y+2xy)-(81+x²+4y²+18x+36y²+4xy)

=49+x²+y²+14x+14y+2xy-81-x²-4y²-18x-36y²-4xy

=32 -3y²-4x²-22y²-2xy

it was my out of syllabus but I'd tried it ❤❤❤