12x^2+3x=17+x

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Solution for 12x^2+3x=17+x equation:


Simplifying
12x2 + 3x = 17 + x

Reorder the terms:
3x + 12x2 = 17 + x

Solving
3x + 12x2 = 17 + x

Solving for variable 'x'.

Reorder the terms:
-17 + 3x + -1x + 12x2 = 17 + x + -17 + -1x

Combine like terms: 3x + -1x = 2x
-17 + 2x + 12x2 = 17 + x + -17 + -1x

Reorder the terms:
-17 + 2x + 12x2 = 17 + -17 + x + -1x

Combine like terms: 17 + -17 = 0
-17 + 2x + 12x2 = 0 + x + -1x
-17 + 2x + 12x2 = x + -1x

Combine like terms: x + -1x = 0
-17 + 2x + 12x2 = 0

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

Divide each side by '12'.
-1.416666667 + 0.1666666667x + x2 = 0

Move the constant term to the right:

Add '1.416666667' to each side of the equation.
-1.416666667 + 0.1666666667x + 1.416666667 + x2 = 0 + 1.416666667

Reorder the terms:
-1.416666667 + 1.416666667 + 0.1666666667x + x2 = 0 + 1.416666667

Combine like terms: -1.416666667 + 1.416666667 = 0.000000000
0.000000000 + 0.1666666667x + x2 = 0 + 1.416666667
0.1666666667x + x2 = 0 + 1.416666667

Combine like terms: 0 + 1.416666667 = 1.416666667
0.1666666667x + x2 = 1.416666667

The x term is 0.1666666667x.  Take half its coefficient (0.08333333335).
Square it (0.006944444447) and add it to both sides.

Add '0.006944444447' to each side of the equation.
0.1666666667x + 0.006944444447 + x2 = 1.416666667 + 0.006944444447

Reorder the terms:
0.006944444447 + 0.1666666667x + x2 = 1.416666667 + 0.006944444447

Combine like terms: 1.416666667 + 0.006944444447 = 1.423611111447
0.006944444447 + 0.1666666667x + x2 = 1.423611111447

Factor a perfect square on the left side:
(x + 0.08333333335)(x + 0.08333333335) = 1.423611111447

Calculate the square root of the right side: 1.193151755

Break this problem into two subproblems by setting 
(x + 0.08333333335) equal to 1.193151755 and -1.193151755.

Subproblem 1

x + 0.08333333335 = 1.193151755 Simplifying x + 0.08333333335 = 1.193151755 Reorder the terms: 0.08333333335 + x = 1.193151755 Solving 0.08333333335 + x = 1.193151755 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.08333333335' to each side of the equation. 0.08333333335 + -0.08333333335 + x = 1.193151755 + -0.08333333335 Combine like terms: 0.08333333335 + -0.08333333335 = 0.00000000000 0.00000000000 + x = 1.193151755 + -0.08333333335 x = 1.193151755 + -0.08333333335 Combine like terms: 1.193151755 + -0.08333333335 = 1.10981842165 x = 1.10981842165 Simplifying x = 1.10981842165

Subproblem 2

x + 0.08333333335 = -1.193151755 Simplifying x + 0.08333333335 = -1.193151755 Reorder the terms: 0.08333333335 + x = -1.193151755 Solving 0.08333333335 + x = -1.193151755 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.08333333335' to each side of the equation. 0.08333333335 + -0.08333333335 + x = -1.193151755 + -0.08333333335 Combine like terms: 0.08333333335 + -0.08333333335 = 0.00000000000 0.00000000000 + x = -1.193151755 + -0.08333333335 x = -1.193151755 + -0.08333333335 Combine like terms: -1.193151755 + -0.08333333335 = -1.27648508835 x = -1.27648508835 Simplifying x = -1.27648508835

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.10981842165, -1.27648508835}

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