SOLUTION: FInd the zeros of f(x)=x2 - 2X

SOLUTION: FInd the zeros of f(x)=x2 - 2X - 5

Question 150922: FInd the zeros of f(x)=x2 - 2X - 5
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!

Start with the given equation.

Notice we have a quadratic equation in the form of where , , and

Let's use the quadratic formula to solve for x

Start with the quadratic formula

Plug in , , and

Negate to get .

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)

Break up the fraction.

Reduce.

or Break up the expression.

So our answers are or

which approximate to or

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