3x^2+14x=16

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Solution for 3x^2+14x=16 equation: 


Simplifying
3x2 + 14x = 16

Reorder the terms:
14x + 3x2 = 16

Solving
14x + 3x2 = 16

Solving for variable 'x'.

Reorder the terms:
-16 + 14x + 3x2 = 16 + -16

Combine like terms: 16 + -16 = 0
-16 + 14x + 3x2 = 0

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

Divide each side by '3'.
-5.333333333 + 4.666666667x + x2 = 0

Move the constant term to the right:

Add '5.333333333' to each side of the equation.
-5.333333333 + 4.666666667x + 5.333333333 + x2 = 0 + 5.333333333

Reorder the terms:
-5.333333333 + 5.333333333 + 4.666666667x + x2 = 0 + 5.333333333

Combine like terms: -5.333333333 + 5.333333333 = 0.000000000
0.000000000 + 4.666666667x + x2 = 0 + 5.333333333
4.666666667x + x2 = 0 + 5.333333333

Combine like terms: 0 + 5.333333333 = 5.333333333
4.666666667x + x2 = 5.333333333

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 = 5.333333333 + 5.444444448

Reorder the terms:
5.444444448 + 4.666666667x + x2 = 5.333333333 + 5.444444448

Combine like terms: 5.333333333 + 5.444444448 = 10.777777781
5.444444448 + 4.666666667x + x2 = 10.777777781

Factor a perfect square on the left side:
(x + 2.333333334)(x + 2.333333334) = 10.777777781

Calculate the square root of the right side: 3.282952601

Break this problem into two subproblems by setting 
(x + 2.333333334) equal to 3.282952601 and -3.282952601.


Subproblem 1
x + 2.333333334 = 3.282952601

Simplifying
x + 2.333333334 = 3.282952601

Reorder the terms:
2.333333334 + x = 3.282952601

Solving
2.333333334 + x = 3.282952601

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 = 3.282952601 + -2.333333334

Combine like terms: 2.333333334 + -2.333333334 = 0.000000000
0.000000000 + x = 3.282952601 + -2.333333334
x = 3.282952601 + -2.333333334

Combine like terms: 3.282952601 + -2.333333334 = 0.949619267
x = 0.949619267

Simplifying
x = 0.949619267


Subproblem 2
x + 2.333333334 = -3.282952601

Simplifying
x + 2.333333334 = -3.282952601

Reorder the terms:
2.333333334 + x = -3.282952601

Solving
2.333333334 + x = -3.282952601

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 = -3.282952601 + -2.333333334

Combine like terms: 2.333333334 + -2.333333334 = 0.000000000
0.000000000 + x = -3.282952601 + -2.333333334
x = -3.282952601 + -2.333333334

Combine like terms: -3.282952601 + -2.333333334 = -5.616285935
x = -5.616285935

Simplifying
x = -5.616285935


Solution
The solution to the problem is based on the solutions
from the subproblems.
x = {0.949619267, -5.616285935}

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