If m =9x²-4xy+5y² and n = -3x²+2xy-y². Find (i) 2m-n (ii) m+2n (ii – InterviewSolution

1.	If m =9x²-4xy+5y² and n = -3x²+2xy-y². Find (i) 2m-n (ii) m+2n (iii) m-3n. In column method.
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