You can put this solution on YOUR website! The way to start this problem is to use the foil method on the two equations in the parenthesis:
(5m-3)(4m+7)
20m^2+35m-12m-21
simplify the equation above:
20m^2+23m-21
now lets work with the 2m and multiply it to the new equation:
2m(20m^2+23m-21)
your answer will be:
40m^3+46m^2-42m
(