# How do you factor the expressions #x^2+3x-4#?

##### 2 Answers

Jun 22, 2018

You use the so called discriminant

#### Explanation:

Most of the quadratic equations have the form of:

In your case: a=1 , b=3, c=-4

Then we use the discriminant

In this case:

We get the result: D=25

Now we need the roots, for which we use the equation:

We get:

And that's all :)

Jun 22, 2018

#### Explanation:

What tow numbers sum up to our middle term of

After some trial and error, we arrive at

Hope this helps!