what should be subtracted from 4x² + 2xy -3y² to obtain x² + y² + 3xy?
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Answer:
3x²-xy-4y²
Step-by-step explanation:
4x²+2xy-3y²-(x²+y²+3xy)
= 4x²+2xy-3y²-x²-y²-3xy
= 3x²-xy-4y²
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