z⋅z=1.21

Multiply z by z.

z2=1.21

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

z=±1.21

Simplify the right side of the equation.

Rewrite 1.21 as 1.12.

z=±1.12

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

z=±1.1

z=±1.1

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.

z=1.1

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

z=-1.1

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

z=1.1,-1.1

z=1.1,-1.1

z=1.1,-1.1

Solve for z z*z=1.21