Question

One of the factor of (x-y) - 4(x-y)-45 is:

Answer 1

Answer:

(a)

Step-by-step explanation:

Given (x-y)-4(x-y)-45 = x-y-4x+4y -45 = -3x+3y-45

=3(-x+y-9)= -3(x-y+9).

Answer 2

Answer:

(x-y) +15 -4(x-y) -60

=-3(x-y+15)

so one of the factor is (x-y) +15