3x(x-1)=36

Solution for 3x(x-1)=36 equation:

Simplifying
3x(x + -1) = 36

Reorder the terms:
3x(-1 + x) = 36
(-1 * 3x + x * 3x) = 36
(-3x + 3x2) = 36

Solving
-3x + 3x2 = 36

Solving for variable 'x'.

Reorder the terms:
-36 + -3x + 3x2 = 36 + -36

Combine like terms: 36 + -36 = 0
-36 + -3x + 3x2 = 0

Factor out the Greatest Common Factor (GCF), '3'.
3(-12 + -1x + x2) = 0

Factor a trinomial.
3((-3 + -1x)(4 + -1x)) = 0

Ignore the factor 3.
Subproblem 1
Set the factor '(-3 + -1x)' equal to zero and attempt to solve:

Simplifying
-3 + -1x = 0

Solving
-3 + -1x = 0

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

Add '3' to each side of the equation.
-3 + 3 + -1x = 0 + 3

Combine like terms: -3 + 3 = 0
0 + -1x = 0 + 3
-1x = 0 + 3

Combine like terms: 0 + 3 = 3
-1x = 3

Divide each side by '-1'.
x = -3

Simplifying
x = -3
Subproblem 2
Set the factor '(4 + -1x)' equal to zero and attempt to solve:

Simplifying
4 + -1x = 0

Solving
4 + -1x = 0

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

Add '-4' to each side of the equation.
4 + -4 + -1x = 0 + -4

Combine like terms: 4 + -4 = 0
0 + -1x = 0 + -4
-1x = 0 + -4

Combine like terms: 0 + -4 = -4
-1x = -4

Divide each side by '-1'.
x = 4

Simplifying
x = 4
Solution
x = {-3, 4}