Question

(3x - 4y)(x + y) + (5x + 7y) (x - y)​

Answer 1

Answer:

$3x {}^{2} - 4xy + 3xy - 4y {}^{2} + 5x {}^{2} - 5xy + 7xy - 7y {}^{2} \\ 8x {}^{2} - 11y {}^{2} + xy$

Answer 2

Answer:

(3x - 4y)(x + y) + (5x + 7y) (x - y)=8x²+xy-11y²

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