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

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


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

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

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

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

Solving for variable 'x'.

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

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

Combine like terms: 14x + x = 15x
-7 + 15x + 2x2 = 3 + -1x + -3 + x

Reorder the terms:
-7 + 15x + 2x2 = 3 + -3 + -1x + x

Combine like terms: 3 + -3 = 0
-7 + 15x + 2x2 = 0 + -1x + x
-7 + 15x + 2x2 = -1x + x

Combine like terms: -1x + x = 0
-7 + 15x + 2x2 = 0

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

Divide each side by '2'.
-3.5 + 7.5x + x2 = 0

Move the constant term to the right:

Add '3.5' to each side of the equation.
-3.5 + 7.5x + 3.5 + x2 = 0 + 3.5

Reorder the terms:
-3.5 + 3.5 + 7.5x + x2 = 0 + 3.5

Combine like terms: -3.5 + 3.5 = 0.0
0.0 + 7.5x + x2 = 0 + 3.5
7.5x + x2 = 0 + 3.5

Combine like terms: 0 + 3.5 = 3.5
7.5x + x2 = 3.5

The x term is 7.5x.  Take half its coefficient (3.75).
Square it (14.0625) and add it to both sides.

Add '14.0625' to each side of the equation.
7.5x + 14.0625 + x2 = 3.5 + 14.0625

Reorder the terms:
14.0625 + 7.5x + x2 = 3.5 + 14.0625

Combine like terms: 3.5 + 14.0625 = 17.5625
14.0625 + 7.5x + x2 = 17.5625

Factor a perfect square on the left side:
(x + 3.75)(x + 3.75) = 17.5625

Calculate the square root of the right side: 4.190763654

Break this problem into two subproblems by setting 
(x + 3.75) equal to 4.190763654 and -4.190763654.

Subproblem 1

x + 3.75 = 4.190763654 Simplifying x + 3.75 = 4.190763654 Reorder the terms: 3.75 + x = 4.190763654 Solving 3.75 + x = 4.190763654 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.75' to each side of the equation. 3.75 + -3.75 + x = 4.190763654 + -3.75 Combine like terms: 3.75 + -3.75 = 0.00 0.00 + x = 4.190763654 + -3.75 x = 4.190763654 + -3.75 Combine like terms: 4.190763654 + -3.75 = 0.440763654 x = 0.440763654 Simplifying x = 0.440763654

Subproblem 2

x + 3.75 = -4.190763654 Simplifying x + 3.75 = -4.190763654 Reorder the terms: 3.75 + x = -4.190763654 Solving 3.75 + x = -4.190763654 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.75' to each side of the equation. 3.75 + -3.75 + x = -4.190763654 + -3.75 Combine like terms: 3.75 + -3.75 = 0.00 0.00 + x = -4.190763654 + -3.75 x = -4.190763654 + -3.75 Combine like terms: -4.190763654 + -3.75 = -7.940763654 x = -7.940763654 Simplifying x = -7.940763654

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.440763654, -7.940763654}

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