4z^2-28=0

Solution for 4z^2-28=0 equation:

Simplifying
4z2 + -28 = 0

Reorder the terms:
-28 + 4z2 = 0

Solving
-28 + 4z2 = 0

Solving for variable 'z'.

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

Add '28' to each side of the equation.
-28 + 28 + 4z2 = 0 + 28

Combine like terms: -28 + 28 = 0
0 + 4z2 = 0 + 28
4z2 = 0 + 28

Combine like terms: 0 + 28 = 28
4z2 = 28

Divide each side by '4'.
z2 = 7

Simplifying
z2 = 7

Take the square root of each side:
z = {-2.645751311, 2.645751311}