# How do you solve #x^2+4x=9# using the quadratic formula?

##### 2 Answers

#### Answer:

is the quadratic formula where:

a=number in front of x^2 (which is 1)

b= number in front of x (a coefficient, which is 4

c= the constant (which is -9)

#### Explanation:

First, you want to make sure the equation is in the form;

you then get the equation:

As stated above, you know the values of a, b and c.

Simply sub these into the quadratic formula.

hope it helps

#### Answer:

#### Explanation:

Rearrange the formula to equal zero

The coefficients of the expression are:

a=1, b=4, c=-9

Substitute into the quadratic equation.