(9+z)(5z-6)=0

Solution for (9+z)(5z-6)=0 equation:

Simplifying
(9 + z)(5z + -6) = 0

Reorder the terms:
(9 + z)(-6 + 5z) = 0

Multiply (9 + z) * (-6 + 5z)
(9(-6 + 5z) + z(-6 + 5z)) = 0
((-6 * 9 + 5z * 9) + z(-6 + 5z)) = 0
((-54 + 45z) + z(-6 + 5z)) = 0
(-54 + 45z + (-6 * z + 5z * z)) = 0
(-54 + 45z + (-6z + 5z2)) = 0

Combine like terms: 45z + -6z = 39z
(-54 + 39z + 5z2) = 0

Solving
-54 + 39z + 5z2 = 0

Solving for variable 'z'.

Factor a trinomial.
(-9 + -1z)(6 + -5z) = 0

Subproblem 1
Set the factor '(-9 + -1z)' equal to zero and attempt to solve:

Simplifying
-9 + -1z = 0

Solving
-9 + -1z = 0

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

Add '9' to each side of the equation.
-9 + 9 + -1z = 0 + 9

Combine like terms: -9 + 9 = 0
0 + -1z = 0 + 9
-1z = 0 + 9

Combine like terms: 0 + 9 = 9
-1z = 9

Divide each side by '-1'.
z = -9

Simplifying
z = -9
Subproblem 2
Set the factor '(6 + -5z)' equal to zero and attempt to solve:

Simplifying
6 + -5z = 0

Solving
6 + -5z = 0

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

Add '-6' to each side of the equation.
6 + -6 + -5z = 0 + -6

Combine like terms: 6 + -6 = 0
0 + -5z = 0 + -6
-5z = 0 + -6

Combine like terms: 0 + -6 = -6
-5z = -6

Divide each side by '-5'.
z = 1.2

Simplifying
z = 1.2
Solution
z = {-9, 1.2}