Subtract 2x^2– 3xy from the sum of x2 – 3y2 + 11xy
and y^2 - 4x2 + 9xy.
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x^2 - 3y^2 + 11xy + y^2 - 4x^2 + 9xy
- 3x^2 - 2y ^ 2 + 20 xy
- 3x^2 - 2y ^ 2 + 20 xy - 2x^2– 3xy
- 5x ^2 - 2y ^2 + 17 xy
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