Answer:
4m^2 - 20m +21
Step-by-step explanation:
(2m-3)(2m-7)
identity >>>> (x+a)(x+b) = x^2 + ( a+b)x + ab
given x= 2m
a= -3
b= -7
(2m)^2 +(-3+ -7)2m+ (-3×-7)
4m^2 +(-6m -14m) + 21
4m^2 -20m +21
