Question

How do you factor completely `xy+2x+4y+8`?

Answer 1

`xy+2x+4y+8=(x+4)(y+2)`

Explanation:

Factor by grouping:

`xy+2x+4y+8`

`=(xy+2x)+(4y+8)`

`=x(y+2)+4(y+2)`

`=(x+4)(y+2)`