Question

Explain how to factor a polynomial with four terms by grouping.
Use grouping to factor 20ay - 10ax + 42by - 21bx. Explain each step.

Answer 1

group a 's together and b's together separately
(20ay-10ax)+(42by-21bx)
take common and make factors

Answer 2

Thanks

Answer 3

To elaborate you could completely factor this equation by

1. 20ay-10ax+42by-21bx
2. 10a(2y-x) +21b (2y-x)
3. (10a+21b) (2y-x)

Hope it helped