5z*z-15=0

Solution for 5z*z-15=0 equation:

Simplifying
5z * z + -15 = 0

Multiply z * z
5z2 + -15 = 0

Reorder the terms:
-15 + 5z2 = 0

Solving
-15 + 5z2 = 0

Solving for variable 'z'.

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

Add '15' to each side of the equation.
-15 + 15 + 5z2 = 0 + 15

Combine like terms: -15 + 15 = 0
0 + 5z2 = 0 + 15
5z2 = 0 + 15

Combine like terms: 0 + 15 = 15
5z2 = 15

Divide each side by '5'.
z2 = 3

Simplifying
z2 = 3

Take the square root of each side:
z = {-1.732050808, 1.732050808}