6x^2-21x=-3x-2x-2

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Solution for 6x^2-21x=-3x-2x-2 equation:


Simplifying
6x2 + -21x = -3x + -2x + -2

Reorder the terms:
-21x + 6x2 = -3x + -2x + -2

Reorder the terms:
-21x + 6x2 = -2 + -3x + -2x

Combine like terms: -3x + -2x = -5x
-21x + 6x2 = -2 + -5x

Solving
-21x + 6x2 = -2 + -5x

Solving for variable 'x'.

Reorder the terms:
2 + -21x + 5x + 6x2 = -2 + -5x + 2 + 5x

Combine like terms: -21x + 5x = -16x
2 + -16x + 6x2 = -2 + -5x + 2 + 5x

Reorder the terms:
2 + -16x + 6x2 = -2 + 2 + -5x + 5x

Combine like terms: -2 + 2 = 0
2 + -16x + 6x2 = 0 + -5x + 5x
2 + -16x + 6x2 = -5x + 5x

Combine like terms: -5x + 5x = 0
2 + -16x + 6x2 = 0

Factor out the Greatest Common Factor (GCF), '2'.
2(1 + -8x + 3x2) = 0

Ignore the factor 2.

Subproblem 1

Set the factor '(1 + -8x + 3x2)' equal to zero and attempt to solve: Simplifying 1 + -8x + 3x2 = 0 Solving 1 + -8x + 3x2 = 0 Begin completing the square. Divide all terms by 3 the coefficient of the squared term: Divide each side by '3'. 0.3333333333 + -2.666666667x + x2 = 0 Move the constant term to the right: Add '-0.3333333333' to each side of the equation. 0.3333333333 + -2.666666667x + -0.3333333333 + x2 = 0 + -0.3333333333 Reorder the terms: 0.3333333333 + -0.3333333333 + -2.666666667x + x2 = 0 + -0.3333333333 Combine like terms: 0.3333333333 + -0.3333333333 = 0.0000000000 0.0000000000 + -2.666666667x + x2 = 0 + -0.3333333333 -2.666666667x + x2 = 0 + -0.3333333333 Combine like terms: 0 + -0.3333333333 = -0.3333333333 -2.666666667x + x2 = -0.3333333333 The x term is -2.666666667x. Take half its coefficient (-1.333333334). Square it (1.777777780) and add it to both sides. Add '1.777777780' to each side of the equation. -2.666666667x + 1.777777780 + x2 = -0.3333333333 + 1.777777780 Reorder the terms: 1.777777780 + -2.666666667x + x2 = -0.3333333333 + 1.777777780 Combine like terms: -0.3333333333 + 1.777777780 = 1.4444444467 1.777777780 + -2.666666667x + x2 = 1.4444444467 Factor a perfect square on the left side: (x + -1.333333334)(x + -1.333333334) = 1.4444444467 Calculate the square root of the right side: 1.201850426 Break this problem into two subproblems by setting (x + -1.333333334) equal to 1.201850426 and -1.201850426.

Subproblem 1

x + -1.333333334 = 1.201850426 Simplifying x + -1.333333334 = 1.201850426 Reorder the terms: -1.333333334 + x = 1.201850426 Solving -1.333333334 + x = 1.201850426 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.333333334' to each side of the equation. -1.333333334 + 1.333333334 + x = 1.201850426 + 1.333333334 Combine like terms: -1.333333334 + 1.333333334 = 0.000000000 0.000000000 + x = 1.201850426 + 1.333333334 x = 1.201850426 + 1.333333334 Combine like terms: 1.201850426 + 1.333333334 = 2.53518376 x = 2.53518376 Simplifying x = 2.53518376

Subproblem 2

x + -1.333333334 = -1.201850426 Simplifying x + -1.333333334 = -1.201850426 Reorder the terms: -1.333333334 + x = -1.201850426 Solving -1.333333334 + x = -1.201850426 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.333333334' to each side of the equation. -1.333333334 + 1.333333334 + x = -1.201850426 + 1.333333334 Combine like terms: -1.333333334 + 1.333333334 = 0.000000000 0.000000000 + x = -1.201850426 + 1.333333334 x = -1.201850426 + 1.333333334 Combine like terms: -1.201850426 + 1.333333334 = 0.131482908 x = 0.131482908 Simplifying x = 0.131482908

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.53518376, 0.131482908}

Solution

x = {2.53518376, 0.131482908}

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