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If m=2, find the value of 3m22m7.

Answer
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Hint: Substitute the value of m in the given equation.
Given that, for m=2, we have to find a value of 3m22m7.
Putting value of m, we get
3m22m73(2)22(2)712471

Note: When there is only one variable in the problem and of which value is also given, one should simply put the value and do the necessary calculations in order to get the answer.