Question

Which is a factor of 5xy – 40x – 15y + 120 ?
Answer
x – 4

y – 8

2

x + 6

Answer 1

5xy – 40x – 15y + 120 = 5y(x-3) -40(x - 3)

factors are (x-3)(5y-40)

I cannot see the correct answer in your question

Answer 2

5x(y-8) -15(y-8)=(5x-15)(y-8)

- so y-8 is the right answer