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3m (m + 1)

?

So you solve it ... 3m^2 + 3m

3m^2+3

Step-by-step explanation:

Step 1: First you have your equation or something.

3m (m+1)

Step 2: You multiply the parenthesis with the number.

Step 3: Then 3m to the parenthesis if you have 3m and m will convert to m^2.

Step 4: Your answer would be 3m^2+3