Differentiate w.r.t. m
140m
Evaluate
70m^{2}
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\frac{\mathrm{d}}{\mathrm{d}m}(70m^{2})
Combine 100m^{2} and -30m^{2} to get 70m^{2}.
2\times 70m^{2-1}
The derivative of ax^{n} is nax^{n-1}.
140m^{2-1}
Multiply 2 times 70.
140m^{1}
Subtract 1 from 2.
140m
For any term t, t^{1}=t.
70m^{2}
Combine 100m^{2} and -30m^{2} to get 70m^{2}.
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