Question

Factor this expression completely:
1)) mn - 4m - 5n + 20
2)) ab + 4 + a + 4b
3)) mr + ns - nr - ms

Answer 1

1) (m-5)(n-4)
2) (a+4)(b+1)
3) (-r+s)(n-m)

Answer 2

ab + 2a + 3b + 6 ?

Answer 3

(a+3)(b+2)

Answer 4

thanks !!

Answer 5

x2 + 13x + 36 ???

Answer 6

No problem. Best response?