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4x²-5xy+3y²
,8x²+7xy-6y²,-2x²-9xy+13y2
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12
Answer:
10x²-7xy+10y²
Step-by-step explanation:
=>4x²+8x²-2x²=10x²
=>-5xy+7xy-9xy=-7xy
=>3y²-6y²+13y²=10y²
=>10x²-7xy+10y²
Answered by
4
Step-by-step explanation:
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