SOLUTION: Solve by using quadratic formula: x^2+4x+2=0 This is what I have, not sure if correct? x=-4+-square root 4^2-4(1)(2) divided by 2 x=-4+-square root 2 divided by 2 x=2

Question 109398: Solve by using quadratic formula:
x^2+4x+2=0
This is what I have, not sure if correct?
x=-4+-square root 4^2-4(1)(2) divided by 2
x=-4+-square root 2 divided by 2
x=2 x=-4
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!

Solved by pluggable solver: Quadratic Formula

Let's use the quadratic formula to solve for x:

Starting with the general quadratic

the general solution using the quadratic equation is:

So lets solve ( notice , , and )

Plug in a=1, b=4, and c=2

Square 4 to get 16

Multiply to get

Combine like terms in the radicand (everything under the square root)

Simplify the square root (note: If you need help with simplifying the square root, check out this solver)

Multiply 2 and 1 to get 2

So now the expression breaks down into two parts

or

Now break up the fraction

or

Simplify

or

So the solutions are:

or

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