6-14x=12-15x^2

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Solution for 6-14x=12-15x^2 equation:


Simplifying
6 + -14x = 12 + -15x2

Solving
6 + -14x = 12 + -15x2

Solving for variable 'x'.

Reorder the terms:
6 + -12 + -14x + 15x2 = 12 + -15x2 + -12 + 15x2

Combine like terms: 6 + -12 = -6
-6 + -14x + 15x2 = 12 + -15x2 + -12 + 15x2

Reorder the terms:
-6 + -14x + 15x2 = 12 + -12 + -15x2 + 15x2

Combine like terms: 12 + -12 = 0
-6 + -14x + 15x2 = 0 + -15x2 + 15x2
-6 + -14x + 15x2 = -15x2 + 15x2

Combine like terms: -15x2 + 15x2 = 0
-6 + -14x + 15x2 = 0

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

Divide each side by '15'.
-0.4 + -0.9333333333x + x2 = 0

Move the constant term to the right:

Add '0.4' to each side of the equation.
-0.4 + -0.9333333333x + 0.4 + x2 = 0 + 0.4

Reorder the terms:
-0.4 + 0.4 + -0.9333333333x + x2 = 0 + 0.4

Combine like terms: -0.4 + 0.4 = 0.0
0.0 + -0.9333333333x + x2 = 0 + 0.4
-0.9333333333x + x2 = 0 + 0.4

Combine like terms: 0 + 0.4 = 0.4
-0.9333333333x + x2 = 0.4

The x term is -0.9333333333x.  Take half its coefficient (-0.4666666667).
Square it (0.2177777778) and add it to both sides.

Add '0.2177777778' to each side of the equation.
-0.9333333333x + 0.2177777778 + x2 = 0.4 + 0.2177777778

Reorder the terms:
0.2177777778 + -0.9333333333x + x2 = 0.4 + 0.2177777778

Combine like terms: 0.4 + 0.2177777778 = 0.6177777778
0.2177777778 + -0.9333333333x + x2 = 0.6177777778

Factor a perfect square on the left side:
(x + -0.4666666667)(x + -0.4666666667) = 0.6177777778

Calculate the square root of the right side: 0.785988408

Break this problem into two subproblems by setting 
(x + -0.4666666667) equal to 0.785988408 and -0.785988408.

Subproblem 1

x + -0.4666666667 = 0.785988408 Simplifying x + -0.4666666667 = 0.785988408 Reorder the terms: -0.4666666667 + x = 0.785988408 Solving -0.4666666667 + x = 0.785988408 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.4666666667' to each side of the equation. -0.4666666667 + 0.4666666667 + x = 0.785988408 + 0.4666666667 Combine like terms: -0.4666666667 + 0.4666666667 = 0.0000000000 0.0000000000 + x = 0.785988408 + 0.4666666667 x = 0.785988408 + 0.4666666667 Combine like terms: 0.785988408 + 0.4666666667 = 1.2526550747 x = 1.2526550747 Simplifying x = 1.2526550747

Subproblem 2

x + -0.4666666667 = -0.785988408 Simplifying x + -0.4666666667 = -0.785988408 Reorder the terms: -0.4666666667 + x = -0.785988408 Solving -0.4666666667 + x = -0.785988408 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.4666666667' to each side of the equation. -0.4666666667 + 0.4666666667 + x = -0.785988408 + 0.4666666667 Combine like terms: -0.4666666667 + 0.4666666667 = 0.0000000000 0.0000000000 + x = -0.785988408 + 0.4666666667 x = -0.785988408 + 0.4666666667 Combine like terms: -0.785988408 + 0.4666666667 = -0.3193217413 x = -0.3193217413 Simplifying x = -0.3193217413

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.2526550747, -0.3193217413}

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