Answer
$4m^{2}$-28m+49
Work Step by Step
In order to simplify the product $(2m-7)^{2}$ we must apply the rule that states that $(a-b)^{2}$=$a^{2}$-2ab+$b^{2}$, and we'll set a=2m and b=7. Therefore,
$(2m-7)^{2}$=$(2m)^{2}$-2(2m)(7)+$7^{2}$
=$4m^{2}$-28m+49
