2x^2-2=-0.5x+4

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Solution for 2x^2-2=-0.5x+4 equation:


Simplifying
2x2 + -2 = -0.5x + 4

Reorder the terms:
-2 + 2x2 = -0.5x + 4

Reorder the terms:
-2 + 2x2 = 4 + -0.5x

Solving
-2 + 2x2 = 4 + -0.5x

Solving for variable 'x'.

Reorder the terms:
-2 + -4 + 0.5x + 2x2 = 4 + -0.5x + -4 + 0.5x

Combine like terms: -2 + -4 = -6
-6 + 0.5x + 2x2 = 4 + -0.5x + -4 + 0.5x

Reorder the terms:
-6 + 0.5x + 2x2 = 4 + -4 + -0.5x + 0.5x

Combine like terms: 4 + -4 = 0
-6 + 0.5x + 2x2 = 0 + -0.5x + 0.5x
-6 + 0.5x + 2x2 = -0.5x + 0.5x

Combine like terms: -0.5x + 0.5x = 0.0
-6 + 0.5x + 2x2 = 0.0

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

Divide each side by '2'.
-3 + 0.25x + x2 = 0.0

Move the constant term to the right:

Add '3' to each side of the equation.
-3 + 0.25x + 3 + x2 = 0.0 + 3

Reorder the terms:
-3 + 3 + 0.25x + x2 = 0.0 + 3

Combine like terms: -3 + 3 = 0
0 + 0.25x + x2 = 0.0 + 3
0.25x + x2 = 0.0 + 3

Combine like terms: 0.0 + 3 = 3
0.25x + x2 = 3

The x term is 0.25x.  Take half its coefficient (0.125).
Square it (0.015625) and add it to both sides.

Add '0.015625' to each side of the equation.
0.25x + 0.015625 + x2 = 3 + 0.015625

Reorder the terms:
0.015625 + 0.25x + x2 = 3 + 0.015625

Combine like terms: 3 + 0.015625 = 3.015625
0.015625 + 0.25x + x2 = 3.015625

Factor a perfect square on the left side:
(x + 0.125)(x + 0.125) = 3.015625

Calculate the square root of the right side: 1.736555499

Break this problem into two subproblems by setting 
(x + 0.125) equal to 1.736555499 and -1.736555499.

Subproblem 1

x + 0.125 = 1.736555499 Simplifying x + 0.125 = 1.736555499 Reorder the terms: 0.125 + x = 1.736555499 Solving 0.125 + x = 1.736555499 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.125' to each side of the equation. 0.125 + -0.125 + x = 1.736555499 + -0.125 Combine like terms: 0.125 + -0.125 = 0.000 0.000 + x = 1.736555499 + -0.125 x = 1.736555499 + -0.125 Combine like terms: 1.736555499 + -0.125 = 1.611555499 x = 1.611555499 Simplifying x = 1.611555499

Subproblem 2

x + 0.125 = -1.736555499 Simplifying x + 0.125 = -1.736555499 Reorder the terms: 0.125 + x = -1.736555499 Solving 0.125 + x = -1.736555499 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.125' to each side of the equation. 0.125 + -0.125 + x = -1.736555499 + -0.125 Combine like terms: 0.125 + -0.125 = 0.000 0.000 + x = -1.736555499 + -0.125 x = -1.736555499 + -0.125 Combine like terms: -1.736555499 + -0.125 = -1.861555499 x = -1.861555499 Simplifying x = -1.861555499

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.611555499, -1.861555499}

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