3x^2-4=9x^2+12x+2

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Solution for 3x^2-4=9x^2+12x+2 equation:


Simplifying
3x2 + -4 = 9x2 + 12x + 2

Reorder the terms:
-4 + 3x2 = 9x2 + 12x + 2

Reorder the terms:
-4 + 3x2 = 2 + 12x + 9x2

Solving
-4 + 3x2 = 2 + 12x + 9x2

Solving for variable 'x'.

Reorder the terms:
-4 + -2 + -12x + 3x2 + -9x2 = 2 + 12x + 9x2 + -2 + -12x + -9x2

Combine like terms: -4 + -2 = -6
-6 + -12x + 3x2 + -9x2 = 2 + 12x + 9x2 + -2 + -12x + -9x2

Combine like terms: 3x2 + -9x2 = -6x2
-6 + -12x + -6x2 = 2 + 12x + 9x2 + -2 + -12x + -9x2

Reorder the terms:
-6 + -12x + -6x2 = 2 + -2 + 12x + -12x + 9x2 + -9x2

Combine like terms: 2 + -2 = 0
-6 + -12x + -6x2 = 0 + 12x + -12x + 9x2 + -9x2
-6 + -12x + -6x2 = 12x + -12x + 9x2 + -9x2

Combine like terms: 12x + -12x = 0
-6 + -12x + -6x2 = 0 + 9x2 + -9x2
-6 + -12x + -6x2 = 9x2 + -9x2

Combine like terms: 9x2 + -9x2 = 0
-6 + -12x + -6x2 = 0

Factor out the Greatest Common Factor (GCF), '-6'.
-6(1 + 2x + x2) = 0

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

Ignore the factor -6.

Subproblem 1

Set the factor '(1 + x)' equal to zero and attempt to solve: Simplifying 1 + x = 0 Solving 1 + x = 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 + x = 0 + -1 Combine like terms: 1 + -1 = 0 0 + x = 0 + -1 x = 0 + -1 Combine like terms: 0 + -1 = -1 x = -1 Simplifying x = -1

Subproblem 2

Set the factor '(1 + x)' equal to zero and attempt to solve: Simplifying 1 + x = 0 Solving 1 + x = 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 + x = 0 + -1 Combine like terms: 1 + -1 = 0 0 + x = 0 + -1 x = 0 + -1 Combine like terms: 0 + -1 = -1 x = -1 Simplifying x = -1

Solution

x = {-1, -1}

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