Question

Factor completely: 6b - 8ab + 15 - 20a

Answer 1

For this case we have the following expression:
 6b - 8ab + 15 - 20a
 We can rewrite the expression factoring.
 We have then:
 (4a-3) * (- 2b-5)
 Checking we have:
 -8ab-20a + 6b + 15
 The resulting expression is the same.
 Answer:
 (4a-3) * (- 2b-5)