2x^2-x=34

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Solution for 2x^2-x=34 equation:


Simplifying
2x2 + -1x = 34

Reorder the terms:
-1x + 2x2 = 34

Solving
-1x + 2x2 = 34

Solving for variable 'x'.

Reorder the terms:
-34 + -1x + 2x2 = 34 + -34

Combine like terms: 34 + -34 = 0
-34 + -1x + 2x2 = 0

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

Divide each side by '2'.
-17 + -0.5x + x2 = 0

Move the constant term to the right:

Add '17' to each side of the equation.
-17 + -0.5x + 17 + x2 = 0 + 17

Reorder the terms:
-17 + 17 + -0.5x + x2 = 0 + 17

Combine like terms: -17 + 17 = 0
0 + -0.5x + x2 = 0 + 17
-0.5x + x2 = 0 + 17

Combine like terms: 0 + 17 = 17
-0.5x + x2 = 17

The x term is -0.5x.  Take half its coefficient (-0.25).
Square it (0.0625) and add it to both sides.

Add '0.0625' to each side of the equation.
-0.5x + 0.0625 + x2 = 17 + 0.0625

Reorder the terms:
0.0625 + -0.5x + x2 = 17 + 0.0625

Combine like terms: 17 + 0.0625 = 17.0625
0.0625 + -0.5x + x2 = 17.0625

Factor a perfect square on the left side:
(x + -0.25)(x + -0.25) = 17.0625

Calculate the square root of the right side: 4.13067791

Break this problem into two subproblems by setting 
(x + -0.25) equal to 4.13067791 and -4.13067791.

Subproblem 1

x + -0.25 = 4.13067791 Simplifying x + -0.25 = 4.13067791 Reorder the terms: -0.25 + x = 4.13067791 Solving -0.25 + x = 4.13067791 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.25' to each side of the equation. -0.25 + 0.25 + x = 4.13067791 + 0.25 Combine like terms: -0.25 + 0.25 = 0.00 0.00 + x = 4.13067791 + 0.25 x = 4.13067791 + 0.25 Combine like terms: 4.13067791 + 0.25 = 4.38067791 x = 4.38067791 Simplifying x = 4.38067791

Subproblem 2

x + -0.25 = -4.13067791 Simplifying x + -0.25 = -4.13067791 Reorder the terms: -0.25 + x = -4.13067791 Solving -0.25 + x = -4.13067791 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.25' to each side of the equation. -0.25 + 0.25 + x = -4.13067791 + 0.25 Combine like terms: -0.25 + 0.25 = 0.00 0.00 + x = -4.13067791 + 0.25 x = -4.13067791 + 0.25 Combine like terms: -4.13067791 + 0.25 = -3.88067791 x = -3.88067791 Simplifying x = -3.88067791

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.38067791, -3.88067791}

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