3x^2+2x-1=x^2-6x-9

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Solution for 3x^2+2x-1=x^2-6x-9 equation:


Simplifying
3x2 + 2x + -1 = x2 + -6x + -9

Reorder the terms:
-1 + 2x + 3x2 = x2 + -6x + -9

Reorder the terms:
-1 + 2x + 3x2 = -9 + -6x + x2

Solving
-1 + 2x + 3x2 = -9 + -6x + x2

Solving for variable 'x'.

Reorder the terms:
-1 + 9 + 2x + 6x + 3x2 + -1x2 = -9 + -6x + x2 + 9 + 6x + -1x2

Combine like terms: -1 + 9 = 8
8 + 2x + 6x + 3x2 + -1x2 = -9 + -6x + x2 + 9 + 6x + -1x2

Combine like terms: 2x + 6x = 8x
8 + 8x + 3x2 + -1x2 = -9 + -6x + x2 + 9 + 6x + -1x2

Combine like terms: 3x2 + -1x2 = 2x2
8 + 8x + 2x2 = -9 + -6x + x2 + 9 + 6x + -1x2

Reorder the terms:
8 + 8x + 2x2 = -9 + 9 + -6x + 6x + x2 + -1x2

Combine like terms: -9 + 9 = 0
8 + 8x + 2x2 = 0 + -6x + 6x + x2 + -1x2
8 + 8x + 2x2 = -6x + 6x + x2 + -1x2

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

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

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

Factor a trinomial.
2((2 + x)(2 + x)) = 0

Ignore the factor 2.

Subproblem 1

Set the factor '(2 + x)' equal to zero and attempt to solve: Simplifying 2 + x = 0 Solving 2 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + x = 0 + -2 Combine like terms: 2 + -2 = 0 0 + x = 0 + -2 x = 0 + -2 Combine like terms: 0 + -2 = -2 x = -2 Simplifying x = -2

Subproblem 2

Set the factor '(2 + x)' equal to zero and attempt to solve: Simplifying 2 + x = 0 Solving 2 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + x = 0 + -2 Combine like terms: 2 + -2 = 0 0 + x = 0 + -2 x = 0 + -2 Combine like terms: 0 + -2 = -2 x = -2 Simplifying x = -2

Solution

x = {-2, -2}

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