2x^2-x+0.25=6

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Solution for 2x^2-x+0.25=6 equation:


Simplifying
2x2 + -1x + 0.25 = 6

Reorder the terms:
0.25 + -1x + 2x2 = 6

Solving
0.25 + -1x + 2x2 = 6

Solving for variable 'x'.

Reorder the terms:
0.25 + -6 + -1x + 2x2 = 6 + -6

Combine like terms: 0.25 + -6 = -5.75
-5.75 + -1x + 2x2 = 6 + -6

Combine like terms: 6 + -6 = 0
-5.75 + -1x + 2x2 = 0

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

Divide each side by '2'.
-2.875 + -0.5x + x2 = 0

Move the constant term to the right:

Add '2.875' to each side of the equation.
-2.875 + -0.5x + 2.875 + x2 = 0 + 2.875

Reorder the terms:
-2.875 + 2.875 + -0.5x + x2 = 0 + 2.875

Combine like terms: -2.875 + 2.875 = 0.000
0.000 + -0.5x + x2 = 0 + 2.875
-0.5x + x2 = 0 + 2.875

Combine like terms: 0 + 2.875 = 2.875
-0.5x + x2 = 2.875

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 = 2.875 + 0.0625

Reorder the terms:
0.0625 + -0.5x + x2 = 2.875 + 0.0625

Combine like terms: 2.875 + 0.0625 = 2.9375
0.0625 + -0.5x + x2 = 2.9375

Factor a perfect square on the left side:
(x + -0.25)(x + -0.25) = 2.9375

Calculate the square root of the right side: 1.71391365

Break this problem into two subproblems by setting 
(x + -0.25) equal to 1.71391365 and -1.71391365.

Subproblem 1

x + -0.25 = 1.71391365 Simplifying x + -0.25 = 1.71391365 Reorder the terms: -0.25 + x = 1.71391365 Solving -0.25 + x = 1.71391365 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 = 1.71391365 + 0.25 Combine like terms: -0.25 + 0.25 = 0.00 0.00 + x = 1.71391365 + 0.25 x = 1.71391365 + 0.25 Combine like terms: 1.71391365 + 0.25 = 1.96391365 x = 1.96391365 Simplifying x = 1.96391365

Subproblem 2

x + -0.25 = -1.71391365 Simplifying x + -0.25 = -1.71391365 Reorder the terms: -0.25 + x = -1.71391365 Solving -0.25 + x = -1.71391365 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 = -1.71391365 + 0.25 Combine like terms: -0.25 + 0.25 = 0.00 0.00 + x = -1.71391365 + 0.25 x = -1.71391365 + 0.25 Combine like terms: -1.71391365 + 0.25 = -1.46391365 x = -1.46391365 Simplifying x = -1.46391365

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.96391365, -1.46391365}

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