2x^2+3x=6x+2x+28

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Solution for 2x^2+3x=6x+2x+28 equation:


Simplifying
2x2 + 3x = 6x + 2x + 28

Reorder the terms:
3x + 2x2 = 6x + 2x + 28

Reorder the terms:
3x + 2x2 = 28 + 6x + 2x

Combine like terms: 6x + 2x = 8x
3x + 2x2 = 28 + 8x

Solving
3x + 2x2 = 28 + 8x

Solving for variable 'x'.

Reorder the terms:
-28 + 3x + -8x + 2x2 = 28 + 8x + -28 + -8x

Combine like terms: 3x + -8x = -5x
-28 + -5x + 2x2 = 28 + 8x + -28 + -8x

Reorder the terms:
-28 + -5x + 2x2 = 28 + -28 + 8x + -8x

Combine like terms: 28 + -28 = 0
-28 + -5x + 2x2 = 0 + 8x + -8x
-28 + -5x + 2x2 = 8x + -8x

Combine like terms: 8x + -8x = 0
-28 + -5x + 2x2 = 0

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

Divide each side by '2'.
-14 + -2.5x + x2 = 0

Move the constant term to the right:

Add '14' to each side of the equation.
-14 + -2.5x + 14 + x2 = 0 + 14

Reorder the terms:
-14 + 14 + -2.5x + x2 = 0 + 14

Combine like terms: -14 + 14 = 0
0 + -2.5x + x2 = 0 + 14
-2.5x + x2 = 0 + 14

Combine like terms: 0 + 14 = 14
-2.5x + x2 = 14

The x term is -2.5x.  Take half its coefficient (-1.25).
Square it (1.5625) and add it to both sides.

Add '1.5625' to each side of the equation.
-2.5x + 1.5625 + x2 = 14 + 1.5625

Reorder the terms:
1.5625 + -2.5x + x2 = 14 + 1.5625

Combine like terms: 14 + 1.5625 = 15.5625
1.5625 + -2.5x + x2 = 15.5625

Factor a perfect square on the left side:
(x + -1.25)(x + -1.25) = 15.5625

Calculate the square root of the right side: 3.94493346

Break this problem into two subproblems by setting 
(x + -1.25) equal to 3.94493346 and -3.94493346.

Subproblem 1

x + -1.25 = 3.94493346 Simplifying x + -1.25 = 3.94493346 Reorder the terms: -1.25 + x = 3.94493346 Solving -1.25 + x = 3.94493346 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.25' to each side of the equation. -1.25 + 1.25 + x = 3.94493346 + 1.25 Combine like terms: -1.25 + 1.25 = 0.00 0.00 + x = 3.94493346 + 1.25 x = 3.94493346 + 1.25 Combine like terms: 3.94493346 + 1.25 = 5.19493346 x = 5.19493346 Simplifying x = 5.19493346

Subproblem 2

x + -1.25 = -3.94493346 Simplifying x + -1.25 = -3.94493346 Reorder the terms: -1.25 + x = -3.94493346 Solving -1.25 + x = -3.94493346 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.25' to each side of the equation. -1.25 + 1.25 + x = -3.94493346 + 1.25 Combine like terms: -1.25 + 1.25 = 0.00 0.00 + x = -3.94493346 + 1.25 x = -3.94493346 + 1.25 Combine like terms: -3.94493346 + 1.25 = -2.69493346 x = -2.69493346 Simplifying x = -2.69493346

Solution

The solution to the problem is based on the solutions from the subproblems. x = {5.19493346, -2.69493346}

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