3x^2+5=14x

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Solution for 3x^2+5=14x equation:


Simplifying
3x2 + 5 = 14x

Reorder the terms:
5 + 3x2 = 14x

Solving
5 + 3x2 = 14x

Solving for variable 'x'.

Reorder the terms:
5 + -14x + 3x2 = 14x + -14x

Combine like terms: 14x + -14x = 0
5 + -14x + 3x2 = 0

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

Divide each side by '3'.
1.666666667 + -4.666666667x + x2 = 0

Move the constant term to the right:

Add '-1.666666667' to each side of the equation.
1.666666667 + -4.666666667x + -1.666666667 + x2 = 0 + -1.666666667

Reorder the terms:
1.666666667 + -1.666666667 + -4.666666667x + x2 = 0 + -1.666666667

Combine like terms: 1.666666667 + -1.666666667 = 0.000000000
0.000000000 + -4.666666667x + x2 = 0 + -1.666666667
-4.666666667x + x2 = 0 + -1.666666667

Combine like terms: 0 + -1.666666667 = -1.666666667
-4.666666667x + x2 = -1.666666667

The x term is -4.666666667x.  Take half its coefficient (-2.333333334).
Square it (5.444444448) and add it to both sides.

Add '5.444444448' to each side of the equation.
-4.666666667x + 5.444444448 + x2 = -1.666666667 + 5.444444448

Reorder the terms:
5.444444448 + -4.666666667x + x2 = -1.666666667 + 5.444444448

Combine like terms: -1.666666667 + 5.444444448 = 3.777777781
5.444444448 + -4.666666667x + x2 = 3.777777781

Factor a perfect square on the left side:
(x + -2.333333334)(x + -2.333333334) = 3.777777781

Calculate the square root of the right side: 1.943650632

Break this problem into two subproblems by setting 
(x + -2.333333334) equal to 1.943650632 and -1.943650632.

Subproblem 1

x + -2.333333334 = 1.943650632 Simplifying x + -2.333333334 = 1.943650632 Reorder the terms: -2.333333334 + x = 1.943650632 Solving -2.333333334 + x = 1.943650632 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.333333334' to each side of the equation. -2.333333334 + 2.333333334 + x = 1.943650632 + 2.333333334 Combine like terms: -2.333333334 + 2.333333334 = 0.000000000 0.000000000 + x = 1.943650632 + 2.333333334 x = 1.943650632 + 2.333333334 Combine like terms: 1.943650632 + 2.333333334 = 4.276983966 x = 4.276983966 Simplifying x = 4.276983966

Subproblem 2

x + -2.333333334 = -1.943650632 Simplifying x + -2.333333334 = -1.943650632 Reorder the terms: -2.333333334 + x = -1.943650632 Solving -2.333333334 + x = -1.943650632 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.333333334' to each side of the equation. -2.333333334 + 2.333333334 + x = -1.943650632 + 2.333333334 Combine like terms: -2.333333334 + 2.333333334 = 0.000000000 0.000000000 + x = -1.943650632 + 2.333333334 x = -1.943650632 + 2.333333334 Combine like terms: -1.943650632 + 2.333333334 = 0.389682702 x = 0.389682702 Simplifying x = 0.389682702

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.276983966, 0.389682702}

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