(Z+Z)Z=(4+5)4

Solution for (Z+Z)Z=(4+5)4 equation:

Simplifying
(Z + Z) * Z = (4 + 5) * 4

Combine like terms: Z + Z = 2Z
(2Z) * Z = (4 + 5) * 4

Remove parenthesis around (2Z)
2Z * Z = (4 + 5) * 4

Multiply Z * Z
2Z2 = (4 + 5) * 4

Combine like terms: 4 + 5 = 9
2Z2 = (9) * 4

Multiply 9 * 4
2Z2 = 36

Solving
2Z2 = 36

Solving for variable 'Z'.

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

Divide each side by '2'.
Z2 = 18

Simplifying
Z2 = 18

Take the square root of each side:
Z = {-4.242640687, 4.242640687}