Question

What is the factored form of x^2+9x+20

Answer 1

x^2+9x+20

-9+-√(9)^2-4(20)/2

-9+1/2 , -9-1/2

-8/2 , -10/2

-4,-5

Answer 2

(x+4)(x+5)

Explanation:

Let's factor x2+9x+20

x2+9x+20

The middle number is 9 and the last number is 20.

Factoring means we want something like

(x+_)(x+_)

Which numbers go in the blanks?

We need two numbers that...

Addd together to get 9

multiply together to get 20

Can you think of the two numbers? hmmmmmm :D

Try 4 and 5:

4+5 = 9

4*5 = 20

Fill in the blanks in

(x+_)(x+_)

with 4 and 5 to g.et...

(x+4)(x+5)

Hope this helps :D