Factor out the gcf and factor completely. 9m3 - 16m
a
m(3m + 4)(3m - 4)
b
m(9m2 - 16)
c
m(9m - 4)
d
m(3m2 + 4)(3m2 + 4)

Look, when you want to do something like put it like x^2. x2 could mean x² or x₂. so to clear confusion, know the notation. to find the product multiply the x's and you get -8x and the y's and you get 6y. since it's all being multiplied it is just -8x6y, or answer a. although the better answer is -48xy(combining -8 and 6) because you should multiply constants whenever you can.