Question

How do you factor #y^3 + 7y^2 + y + 7?

Answer 1

`y^3+7y^2+y+7`

Group as
`color(red)((y^3+7y^2)) + color(blue)((y+7))`

`= color(red)((y^2)(y+7)) + color(blue)((1)(y+7))`

`=(y^2+1)(y+7)`