2z^2-20=0

Solution for 2z^2-20=0 equation:

Simplifying
2z2 + -20 = 0

Reorder the terms:
-20 + 2z2 = 0

Solving
-20 + 2z2 = 0

Solving for variable 'z'.

Move all terms containing z to the left, all other terms to the right.

Add '20' to each side of the equation.
-20 + 20 + 2z2 = 0 + 20

Combine like terms: -20 + 20 = 0
0 + 2z2 = 0 + 20
2z2 = 0 + 20

Combine like terms: 0 + 20 = 20
2z2 = 20

Divide each side by '2'.
z2 = 10

Simplifying
z2 = 10

Take the square root of each side:
z = {-3.16227766, 3.16227766}