3x^2-2x-3-8x+6-x^2=

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Solution for 3x^2-2x-3-8x+6-x^2= equation:


Simplifying
3x2 + -2x + -3 + -8x + 6 + -1x2 = 0

Reorder the terms:
-3 + 6 + -2x + -8x + 3x2 + -1x2 = 0

Combine like terms: -3 + 6 = 3
3 + -2x + -8x + 3x2 + -1x2 = 0

Combine like terms: -2x + -8x = -10x
3 + -10x + 3x2 + -1x2 = 0

Combine like terms: 3x2 + -1x2 = 2x2
3 + -10x + 2x2 = 0

Solving
3 + -10x + 2x2 = 0

Solving for variable 'x'.

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

Divide each side by '2'.
1.5 + -5x + x2 = 0

Move the constant term to the right:

Add '-1.5' to each side of the equation.
1.5 + -5x + -1.5 + x2 = 0 + -1.5

Reorder the terms:
1.5 + -1.5 + -5x + x2 = 0 + -1.5

Combine like terms: 1.5 + -1.5 = 0.0
0.0 + -5x + x2 = 0 + -1.5
-5x + x2 = 0 + -1.5

Combine like terms: 0 + -1.5 = -1.5
-5x + x2 = -1.5

The x term is -5x.  Take half its coefficient (-2.5).
Square it (6.25) and add it to both sides.

Add '6.25' to each side of the equation.
-5x + 6.25 + x2 = -1.5 + 6.25

Reorder the terms:
6.25 + -5x + x2 = -1.5 + 6.25

Combine like terms: -1.5 + 6.25 = 4.75
6.25 + -5x + x2 = 4.75

Factor a perfect square on the left side:
(x + -2.5)(x + -2.5) = 4.75

Calculate the square root of the right side: 2.179449472

Break this problem into two subproblems by setting 
(x + -2.5) equal to 2.179449472 and -2.179449472.

Subproblem 1

x + -2.5 = 2.179449472 Simplifying x + -2.5 = 2.179449472 Reorder the terms: -2.5 + x = 2.179449472 Solving -2.5 + x = 2.179449472 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.5' to each side of the equation. -2.5 + 2.5 + x = 2.179449472 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + x = 2.179449472 + 2.5 x = 2.179449472 + 2.5 Combine like terms: 2.179449472 + 2.5 = 4.679449472 x = 4.679449472 Simplifying x = 4.679449472

Subproblem 2

x + -2.5 = -2.179449472 Simplifying x + -2.5 = -2.179449472 Reorder the terms: -2.5 + x = -2.179449472 Solving -2.5 + x = -2.179449472 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.5' to each side of the equation. -2.5 + 2.5 + x = -2.179449472 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + x = -2.179449472 + 2.5 x = -2.179449472 + 2.5 Combine like terms: -2.179449472 + 2.5 = 0.320550528 x = 0.320550528 Simplifying x = 0.320550528

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.679449472, 0.320550528}

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