Add 5x²-13xy+4y²-9 and 7y²+5xy-12x²+13
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Answered by
8
Answer:
5x^2-13xy+4y^2-9+7y^2+5xy-12x^2+13
=-7x^2-8xy+11y^2+4
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1
Step-by-step explanation:
abcd...........................,.,......?
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