# How do you factor: #y= x^2+9x+20 #?

##### 1 Answer

Dec 10, 2015

#### Answer:

Factor

#### Explanation:

Find 2 numbers knowing sum (9) and product (20). Factor pairs of (20) --> (2, 10)(4, 5). This sum is 9 = b. Then the 2 numbers are: 4 and 5.

Factored form: y = (x + 4)(x + 5)