3x^2=21x-18

Solution for 3x^2=21x-18 equation:

Simplifying
3x2 = 21x + -18

Reorder the terms:
3x2 = -18 + 21x

Solving
3x2 = -18 + 21x

Solving for variable 'x'.

Reorder the terms:
18 + -21x + 3x2 = -18 + 21x + 18 + -21x

Reorder the terms:
18 + -21x + 3x2 = -18 + 18 + 21x + -21x

Combine like terms: -18 + 18 = 0
18 + -21x + 3x2 = 0 + 21x + -21x
18 + -21x + 3x2 = 21x + -21x

Combine like terms: 21x + -21x = 0
18 + -21x + 3x2 = 0

Factor out the Greatest Common Factor (GCF), '3'.
3(6 + -7x + x2) = 0

Factor a trinomial.
3((1 + -1x)(6 + -1x)) = 0

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

Simplifying
1 + -1x = 0

Solving
1 + -1x = 0

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

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

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

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

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

Simplifying
x = 1
Subproblem 2
Set the factor '(6 + -1x)' equal to zero and attempt to solve:

Simplifying
6 + -1x = 0

Solving
6 + -1x = 0

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

Add '-6' to each side of the equation.
6 + -6 + -1x = 0 + -6

Combine like terms: 6 + -6 = 0
0 + -1x = 0 + -6
-1x = 0 + -6

Combine like terms: 0 + -6 = -6
-1x = -6

Divide each side by '-1'.
x = 6

Simplifying
x = 6
Solution
x = {1, 6}