# How do you solve #-3x^2+12=0#?

##### 1 Answer

Mar 25, 2016

x=2

#### Explanation:

-3x^2+12=0

When solving an equation for a variable it is important to go in reverse order of operations. You have to undo everything in the equation.

Subtract 12 from each side:

-3x^2+12-12=0-12

Simplify:

-3x^2=-12

Next, divide both sides by -3:

(-3x^2)/-3=(-12)/-3

Simplify:

x^2=4

Now, undo the squared equation with a square root.

sqrt(x^2)=sqrt(4)

Simplify:

x=2