Question

How do you factor the expression `d^2+10d+9`?

Answer 1

`(d+9)(d+1)`

Explanation:

To factor the expression `ax^2 + bx +c` find the factors of c that add up to give b. In this case 9 and 1 add up to 10 so the factorized expression is
`(d+9)(d+1)`