Question

PLEASE HELP!!!

Factor completely x^2 + 20x − 36.

Answer 1

Do you know how to split this into a binomial?

Answer 2

no

Answer 3

I was going to say (x+2)(x+18)

Answer 4

But there is a minus

Answer 5

so then what would it be?

Answer 6

check your equation plz

Answer 7

that was the equation given to me

one of my answers is prime, is that the answer?

Answer 8

Orime would be correct

Answer 9

use the discriminant b^2 - 4ac

Answer 10

*Prime
there are no numbers that multiply to -36 but add to make 20

Answer 11

okay thanks :)

Answer 12

ax^2+bx+c=0
x^2 + 20x − 36.
a*c <----36 x 1 =-36
b <----20

Answer 13

You are trying to factor a trinomial of the form:
\(x^2 + ax + b\)

For this type of factoring, you need to find two numbers whose product is b and whose sum is a.
In this case, you need two numbers whose product is -36 and whose sum is 20.
If two such numbers do not exist, then the trinomial is not factorable, so it's prime.

Answer 14

thanks

Answer 15

nvm

Answer 16

Factors of -36 Sum of the factors
-1, 36 35
-36, 1 -35
-18, 2 -16
-2, 18 16
-12, 3 -9
-3, 12 9
-9, 4 -5
-4, 9 5
-6, 6 0

As you can see, there are no two factors of -36 which have a sum of 20. That means this trinomial is not factorable. it is prime.