x2-5=-1

Add 5 to both sides of the equation.

x2=-1+5

Add -1 and 5.

x2=4

x2=4

Take the square root of both sides of the equation to eliminate the exponent on the left side.

x=±4

Simplify the right side of the equation.

Rewrite 4 as 22.

x=±22

Pull terms out from under the radical, assuming positive real numbers.

x=±2

x=±2

The complete solution is the result of both the positive and negative portions of the solution.

First, use the positive value of the ± to find the first solution.

x=2

Next, use the negative value of the ± to find the second solution.

x=-2

The complete solution is the result of both the positive and negative portions of the solution.

x=2,-2

x=2,-2

x=2,-2

Solve Using the Square Root Property x^2-5=-1