SOLUTION: I am lost. If anyone can help I would appreciate it. Thanks Solve x^2+7x-1=0 Find the x intercepts of f(x)=x^2+7x-1

Question 129694: I am lost. If anyone can help I would appreciate it. Thanks
Solve
x^2+7x-1=0
Find the x intercepts of
f(x)=x^2+7x-1
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=7, and c=-1

Square 7 to get 49

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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