SOLUTION: f(x) = 7x2 - 2 how do I use the Quadratic Formula to find the x-intercepts of this equation?

Question 210629: f(x) = 7x2 - 2 how do I use the Quadratic Formula to find the x-intercepts of this equation?
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
Start with the given function.

Plug in

Notice that the quadratic is in the form of where , , and

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

Start with the quadratic formula

Plug in , , and

Square to get .

Multiply to get

Rewrite as

Add to to get

Multiply and to get .

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

or Break up the expression and reduce.

So the solutions are or
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