3x^2=14-9x

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Solution for 3x^2=14-9x equation:


Simplifying
3x2 = 14 + -9x

Solving
3x2 = 14 + -9x

Solving for variable 'x'.

Reorder the terms:
-14 + 9x + 3x2 = 14 + -9x + -14 + 9x

Reorder the terms:
-14 + 9x + 3x2 = 14 + -14 + -9x + 9x

Combine like terms: 14 + -14 = 0
-14 + 9x + 3x2 = 0 + -9x + 9x
-14 + 9x + 3x2 = -9x + 9x

Combine like terms: -9x + 9x = 0
-14 + 9x + 3x2 = 0

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

Divide each side by '3'.
-4.666666667 + 3x + x2 = 0

Move the constant term to the right:

Add '4.666666667' to each side of the equation.
-4.666666667 + 3x + 4.666666667 + x2 = 0 + 4.666666667

Reorder the terms:
-4.666666667 + 4.666666667 + 3x + x2 = 0 + 4.666666667

Combine like terms: -4.666666667 + 4.666666667 = 0.000000000
0.000000000 + 3x + x2 = 0 + 4.666666667
3x + x2 = 0 + 4.666666667

Combine like terms: 0 + 4.666666667 = 4.666666667
3x + x2 = 4.666666667

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 = 4.666666667 + 2.25

Reorder the terms:
2.25 + 3x + x2 = 4.666666667 + 2.25

Combine like terms: 4.666666667 + 2.25 = 6.916666667
2.25 + 3x + x2 = 6.916666667

Factor a perfect square on the left side:
(x + 1.5)(x + 1.5) = 6.916666667

Calculate the square root of the right side: 2.62995564

Break this problem into two subproblems by setting 
(x + 1.5) equal to 2.62995564 and -2.62995564.

Subproblem 1

x + 1.5 = 2.62995564 Simplifying x + 1.5 = 2.62995564 Reorder the terms: 1.5 + x = 2.62995564 Solving 1.5 + x = 2.62995564 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 = 2.62995564 + -1.5 Combine like terms: 1.5 + -1.5 = 0.0 0.0 + x = 2.62995564 + -1.5 x = 2.62995564 + -1.5 Combine like terms: 2.62995564 + -1.5 = 1.12995564 x = 1.12995564 Simplifying x = 1.12995564

Subproblem 2

x + 1.5 = -2.62995564 Simplifying x + 1.5 = -2.62995564 Reorder the terms: 1.5 + x = -2.62995564 Solving 1.5 + x = -2.62995564 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 = -2.62995564 + -1.5 Combine like terms: 1.5 + -1.5 = 0.0 0.0 + x = -2.62995564 + -1.5 x = -2.62995564 + -1.5 Combine like terms: -2.62995564 + -1.5 = -4.12995564 x = -4.12995564 Simplifying x = -4.12995564

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.12995564, -4.12995564}

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