Question

Can you help me and explain ? thank you !

Answer 1

Hey there!

Putting it int he form of ax^2+bx+c would give you:

x^2+9x+20 = 0 because you add the 9x to the other side and rearrange the terms.

Now, the next step in solving means we have to factor it. We want two numbers that add to 9 and multiply to 20. These numbers are 5 and 4. Therefore, your answer is:

(x+5)(x+4) = 0

The answer is C.

Hope this helps!

Answer 2

First, you would add 9x to both sides so that you get:

x^2 + 9x + 20 = 0.

Then, you want to factor. You want coefficients of x that add to 9 and have the constants add to 20:

(x + 5) * (x + 4) = 0

The answer is (C).