3x^2-72=6x

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Solution for 3x^2-72=6x equation:


Simplifying
3x2 + -72 = 6x

Reorder the terms:
-72 + 3x2 = 6x

Solving
-72 + 3x2 = 6x

Solving for variable 'x'.

Reorder the terms:
-72 + -6x + 3x2 = 6x + -6x

Combine like terms: 6x + -6x = 0
-72 + -6x + 3x2 = 0

Factor out the Greatest Common Factor (GCF), '3'.
3(-24 + -2x + x2) = 0

Factor a trinomial.
3((-4 + -1x)(6 + -1x)) = 0

Ignore the factor 3.

Subproblem 1

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

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 = {-4, 6}

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