3(x^2-2x)=x^2+8

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Solution for 3(x^2-2x)=x^2+8 equation: 


Simplifying
3(x2 + -2x) = x2 + 8

Reorder the terms:
3(-2x + x2) = x2 + 8
(-2x * 3 + x2 * 3) = x2 + 8
(-6x + 3x2) = x2 + 8

Reorder the terms:
-6x + 3x2 = 8 + x2

Solving
-6x + 3x2 = 8 + x2

Solving for variable 'x'.

Reorder the terms:
-8 + -6x + 3x2 + -1x2 = 8 + x2 + -8 + -1x2

Combine like terms: 3x2 + -1x2 = 2x2
-8 + -6x + 2x2 = 8 + x2 + -8 + -1x2

Reorder the terms:
-8 + -6x + 2x2 = 8 + -8 + x2 + -1x2

Combine like terms: 8 + -8 = 0
-8 + -6x + 2x2 = 0 + x2 + -1x2
-8 + -6x + 2x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
-8 + -6x + 2x2 = 0

Factor out the Greatest Common Factor (GCF), '2'.
2(-4 + -3x + x2) = 0

Factor a trinomial.
2((-1 + -1x)(4 + -1x)) = 0

Ignore the factor 2.

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 '(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 = {-1, 4}

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