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Question

If $$m=2$$, find the value of $$3m^2-2m-7$$.


Solution

$$3m^2-2m-7=3(2)^2-2(2)-7$$  [Putting $$m=2$$]
$$=3\times 4-2\times 2-7=12-4-7$$
$$=12-11=1$$.

Mathematics
NCERT
Standard VII

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