z+20=Z
To remove the radical on the left side of the equation, square both sides of the equation.
z+202=Z2
Multiply the exponents in ((z+20)12)2.
Apply the power rule and multiply exponents, (am)n=amn.
(z+20)12⋅2=Z2
Cancel the common factor of 2.
Cancel the common factor.
(z+20)12⋅2=Z2
Rewrite the expression.
(z+20)1=Z2
(z+20)1=Z2
(z+20)1=Z2
Simplify.
z+20=Z2
z+20=Z2
Subtract 20 from both sides of the equation.
z=Z2-20
Solve for z square root of z+20=Z