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Question
Subtract: -m2 + 5mn from 4m2 - 3mn + 8
Solution
(4m2 - 3mn + 8) - (- m2 + 5mn) = 4m2 - 3mn + 8 + m2 - 5 mn
= 4m2 + m2 - 3mn - 5 mn + 8
= 5m2 - 8mn + 8
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