Factor a number, variable or expression out of the polynomial below

X (4x-5) + 9 (4x-5)

A) 9x (4x+5)

B) (x+9) (4x-5)

C) 9x (4x-5)

D) (X+9) (4x+5)

Factor out the (4x-5), which is the GCF to go from

x (4x-5) + 9 (4x-5)

to

(4x-5) (x+9)

Note: (4x-5) (x+9) is the same as (x+9) (4x-5). The order of the factors does not matter. You can multiply in any order.

Therefore, the final answer is choice B