4-2x^2=x-3

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Solution for 4-2x^2=x-3 equation:


Simplifying
4 + -2x2 = x + -3

Reorder the terms:
4 + -2x2 = -3 + x

Solving
4 + -2x2 = -3 + x

Solving for variable 'x'.

Reorder the terms:
4 + 3 + -1x + -2x2 = -3 + x + 3 + -1x

Combine like terms: 4 + 3 = 7
7 + -1x + -2x2 = -3 + x + 3 + -1x

Reorder the terms:
7 + -1x + -2x2 = -3 + 3 + x + -1x

Combine like terms: -3 + 3 = 0
7 + -1x + -2x2 = 0 + x + -1x
7 + -1x + -2x2 = x + -1x

Combine like terms: x + -1x = 0
7 + -1x + -2x2 = 0

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

Divide each side by '-2'.
-3.5 + 0.5x + x2 = 0

Move the constant term to the right:

Add '3.5' to each side of the equation.
-3.5 + 0.5x + 3.5 + x2 = 0 + 3.5

Reorder the terms:
-3.5 + 3.5 + 0.5x + x2 = 0 + 3.5

Combine like terms: -3.5 + 3.5 = 0.0
0.0 + 0.5x + x2 = 0 + 3.5
0.5x + x2 = 0 + 3.5

Combine like terms: 0 + 3.5 = 3.5
0.5x + x2 = 3.5

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 = 3.5 + 0.0625

Reorder the terms:
0.0625 + 0.5x + x2 = 3.5 + 0.0625

Combine like terms: 3.5 + 0.0625 = 3.5625
0.0625 + 0.5x + x2 = 3.5625

Factor a perfect square on the left side:
(x + 0.25)(x + 0.25) = 3.5625

Calculate the square root of the right side: 1.887458609

Break this problem into two subproblems by setting 
(x + 0.25) equal to 1.887458609 and -1.887458609.

Subproblem 1

x + 0.25 = 1.887458609 Simplifying x + 0.25 = 1.887458609 Reorder the terms: 0.25 + x = 1.887458609 Solving 0.25 + x = 1.887458609 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 = 1.887458609 + -0.25 Combine like terms: 0.25 + -0.25 = 0.00 0.00 + x = 1.887458609 + -0.25 x = 1.887458609 + -0.25 Combine like terms: 1.887458609 + -0.25 = 1.637458609 x = 1.637458609 Simplifying x = 1.637458609

Subproblem 2

x + 0.25 = -1.887458609 Simplifying x + 0.25 = -1.887458609 Reorder the terms: 0.25 + x = -1.887458609 Solving 0.25 + x = -1.887458609 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 = -1.887458609 + -0.25 Combine like terms: 0.25 + -0.25 = 0.00 0.00 + x = -1.887458609 + -0.25 x = -1.887458609 + -0.25 Combine like terms: -1.887458609 + -0.25 = -2.137458609 x = -2.137458609 Simplifying x = -2.137458609

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.637458609, -2.137458609}

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