9x=(3x^2)-2

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Solution for 9x=(3x^2)-2 equation:


Simplifying
9x = (3x2) + -2

Reorder the terms:
9x = -2 + (3x2)

Solving
9x = -2 + (3x2)

Solving for variable 'x'.

Reorder the terms:
2 + 9x + (-3x2) = -2 + (3x2) + 2 + (-3x2)

Reorder the terms:
2 + 9x + (-3x2) = -2 + 2 + (3x2) + (-3x2)

Combine like terms: -2 + 2 = 0
2 + 9x + (-3x2) = 0 + (3x2) + (-3x2)
2 + 9x + (-3x2) = (3x2) + (-3x2)

Combine like terms: (3x2) + (-3x2) = 0
2 + 9x + (-3x2) = 0

Begin completing the square.  Divide all terms by
-3 the coefficient of the squared term: 

Divide each side by '-3'.
-0.6666666667 + -3x + x2 = 0

Move the constant term to the right:

Add '0.6666666667' to each side of the equation.
-0.6666666667 + -3x + 0.6666666667 + x2 = 0 + 0.6666666667

Reorder the terms:
-0.6666666667 + 0.6666666667 + -3x + x2 = 0 + 0.6666666667

Combine like terms: -0.6666666667 + 0.6666666667 = 0.0000000000
0.0000000000 + -3x + x2 = 0 + 0.6666666667
-3x + x2 = 0 + 0.6666666667

Combine like terms: 0 + 0.6666666667 = 0.6666666667
-3x + x2 = 0.6666666667

The x term is -3x.  Take half its coefficient (-1.5).
Square it (2.25) and add it to both sides.

Add '2.25' to each side of the equation.
-3x + 2.25 + x2 = 0.6666666667 + 2.25

Reorder the terms:
2.25 + -3x + x2 = 0.6666666667 + 2.25

Combine like terms: 0.6666666667 + 2.25 = 2.9166666667
2.25 + -3x + x2 = 2.9166666667

Factor a perfect square on the left side:
((x) + -1.5)((x) + -1.5) = 2.9166666667

Calculate the square root of the right side: 1.707825128

Break this problem into two subproblems by setting 
((x) + -1.5) equal to 1.707825128 and -1.707825128.

Subproblem 1

(x) + -1.5 = 1.707825128 Simplifying (x) + -1.5 = 1.707825128 x + -1.5 = 1.707825128 Reorder the terms: -1.5 + x = 1.707825128 Solving -1.5 + x = 1.707825128 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.5' to each side of the equation. -1.5 + 1.5 + x = 1.707825128 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + x = 1.707825128 + 1.5 x = 1.707825128 + 1.5 Combine like terms: 1.707825128 + 1.5 = 3.207825128 x = 3.207825128 Simplifying x = 3.207825128

Subproblem 2

(x) + -1.5 = -1.707825128 Simplifying (x) + -1.5 = -1.707825128 x + -1.5 = -1.707825128 Reorder the terms: -1.5 + x = -1.707825128 Solving -1.5 + x = -1.707825128 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.5' to each side of the equation. -1.5 + 1.5 + x = -1.707825128 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + x = -1.707825128 + 1.5 x = -1.707825128 + 1.5 Combine like terms: -1.707825128 + 1.5 = -0.207825128 x = -0.207825128 Simplifying x = -0.207825128

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.207825128, -0.207825128}

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