what should be taken away from 3x2-4y2+5xy+20 to obtain -x2-y2+6xy+20?
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Answer:
2x2-5y2+11xy+40
Step-by-step explanation:
3x2-x2=2x2
-4y2-y2=-5y2
5xy+6xy=11xy
20+20=40
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