2x^2+14x-4=-x^2+3

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Solution for 2x^2+14x-4=-x^2+3 equation:


Simplifying
2x2 + 14x + -4 = -1x2 + 3

Reorder the terms:
-4 + 14x + 2x2 = -1x2 + 3

Reorder the terms:
-4 + 14x + 2x2 = 3 + -1x2

Solving
-4 + 14x + 2x2 = 3 + -1x2

Solving for variable 'x'.

Reorder the terms:
-4 + -3 + 14x + 2x2 + x2 = 3 + -1x2 + -3 + x2

Combine like terms: -4 + -3 = -7
-7 + 14x + 2x2 + x2 = 3 + -1x2 + -3 + x2

Combine like terms: 2x2 + x2 = 3x2
-7 + 14x + 3x2 = 3 + -1x2 + -3 + x2

Reorder the terms:
-7 + 14x + 3x2 = 3 + -3 + -1x2 + x2

Combine like terms: 3 + -3 = 0
-7 + 14x + 3x2 = 0 + -1x2 + x2
-7 + 14x + 3x2 = -1x2 + x2

Combine like terms: -1x2 + x2 = 0
-7 + 14x + 3x2 = 0

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

Divide each side by '3'.
-2.333333333 + 4.666666667x + x2 = 0

Move the constant term to the right:

Add '2.333333333' to each side of the equation.
-2.333333333 + 4.666666667x + 2.333333333 + x2 = 0 + 2.333333333

Reorder the terms:
-2.333333333 + 2.333333333 + 4.666666667x + x2 = 0 + 2.333333333

Combine like terms: -2.333333333 + 2.333333333 = 0.000000000
0.000000000 + 4.666666667x + x2 = 0 + 2.333333333
4.666666667x + x2 = 0 + 2.333333333

Combine like terms: 0 + 2.333333333 = 2.333333333
4.666666667x + x2 = 2.333333333

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 = 2.333333333 + 5.444444448

Reorder the terms:
5.444444448 + 4.666666667x + x2 = 2.333333333 + 5.444444448

Combine like terms: 2.333333333 + 5.444444448 = 7.777777781
5.444444448 + 4.666666667x + x2 = 7.777777781

Factor a perfect square on the left side:
(x + 2.333333334)(x + 2.333333334) = 7.777777781

Calculate the square root of the right side: 2.788866756

Break this problem into two subproblems by setting 
(x + 2.333333334) equal to 2.788866756 and -2.788866756.

Subproblem 1

x + 2.333333334 = 2.788866756 Simplifying x + 2.333333334 = 2.788866756 Reorder the terms: 2.333333334 + x = 2.788866756 Solving 2.333333334 + x = 2.788866756 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 = 2.788866756 + -2.333333334 Combine like terms: 2.333333334 + -2.333333334 = 0.000000000 0.000000000 + x = 2.788866756 + -2.333333334 x = 2.788866756 + -2.333333334 Combine like terms: 2.788866756 + -2.333333334 = 0.455533422 x = 0.455533422 Simplifying x = 0.455533422

Subproblem 2

x + 2.333333334 = -2.788866756 Simplifying x + 2.333333334 = -2.788866756 Reorder the terms: 2.333333334 + x = -2.788866756 Solving 2.333333334 + x = -2.788866756 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 = -2.788866756 + -2.333333334 Combine like terms: 2.333333334 + -2.333333334 = 0.000000000 0.000000000 + x = -2.788866756 + -2.333333334 x = -2.788866756 + -2.333333334 Combine like terms: -2.788866756 + -2.333333334 = -5.12220009 x = -5.12220009 Simplifying x = -5.12220009

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.455533422, -5.12220009}

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