Question

How do you factor the trinomial `x^2 + 22x + 72`?

Answer 1

`=>(x+18)(x+4)`

Explanation:

`72=18xx4;18+4 =22`
`x^2+22x+72`
`=>x^2+18x+4x+72`
`=>x(x+18)+4(x+18)`
`=>(x+18)(x+4)`