Question

subtract the sum of 3x²+2xy-2y² and 5y²-7xy from 5x² from 5x²-2y²-3xy​

Answer 1

Your answer is in the attachment.

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Answer 2

Answer:

First,

(3x²+2xy-2y²) + (5y²-7xy)

= 3x²+2xy-2y²+5y²-7xy

= 3x²+2xy-7xy+5y²-2y²

= 3x²-5xy+3y²

Now,

(3x²-5xy+3y²) - (5x²-2y²-3xy​)

= 3x²-5xy+3y²-5x²+2y²+3xy

= 3x²-5x²-5xy+3xy+3y²+2y²

= -2x²-2xy+5y²