2x-1*x*x+8*2x+5*x-3=

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Solution for 2x-1*x*x+8*2x+5*x-3= equation:


Simplifying
2x + -1x * x + 8 * 2x + 5x + -3 = 0

Multiply x * x
2x + -1x2 + 8 * 2x + 5x + -3 = 0

Multiply 8 * 2
2x + -1x2 + 16x + 5x + -3 = 0

Reorder the terms:
-3 + 2x + 16x + 5x + -1x2 = 0

Combine like terms: 2x + 16x = 18x
-3 + 18x + 5x + -1x2 = 0

Combine like terms: 18x + 5x = 23x
-3 + 23x + -1x2 = 0

Solving
-3 + 23x + -1x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
3 + -23x + x2 = 0

Move the constant term to the right:

Add '-3' to each side of the equation.
3 + -23x + -3 + x2 = 0 + -3

Reorder the terms:
3 + -3 + -23x + x2 = 0 + -3

Combine like terms: 3 + -3 = 0
0 + -23x + x2 = 0 + -3
-23x + x2 = 0 + -3

Combine like terms: 0 + -3 = -3
-23x + x2 = -3

The x term is -23x.  Take half its coefficient (-11.5).
Square it (132.25) and add it to both sides.

Add '132.25' to each side of the equation.
-23x + 132.25 + x2 = -3 + 132.25

Reorder the terms:
132.25 + -23x + x2 = -3 + 132.25

Combine like terms: -3 + 132.25 = 129.25
132.25 + -23x + x2 = 129.25

Factor a perfect square on the left side:
(x + -11.5)(x + -11.5) = 129.25

Calculate the square root of the right side: 11.368817001

Break this problem into two subproblems by setting 
(x + -11.5) equal to 11.368817001 and -11.368817001.

Subproblem 1

x + -11.5 = 11.368817001 Simplifying x + -11.5 = 11.368817001 Reorder the terms: -11.5 + x = 11.368817001 Solving -11.5 + x = 11.368817001 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '11.5' to each side of the equation. -11.5 + 11.5 + x = 11.368817001 + 11.5 Combine like terms: -11.5 + 11.5 = 0.0 0.0 + x = 11.368817001 + 11.5 x = 11.368817001 + 11.5 Combine like terms: 11.368817001 + 11.5 = 22.868817001 x = 22.868817001 Simplifying x = 22.868817001

Subproblem 2

x + -11.5 = -11.368817001 Simplifying x + -11.5 = -11.368817001 Reorder the terms: -11.5 + x = -11.368817001 Solving -11.5 + x = -11.368817001 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '11.5' to each side of the equation. -11.5 + 11.5 + x = -11.368817001 + 11.5 Combine like terms: -11.5 + 11.5 = 0.0 0.0 + x = -11.368817001 + 11.5 x = -11.368817001 + 11.5 Combine like terms: -11.368817001 + 11.5 = 0.131182999 x = 0.131182999 Simplifying x = 0.131182999

Solution

The solution to the problem is based on the solutions from the subproblems. x = {22.868817001, 0.131182999}

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