x*x+-2x+15+-x+4=180

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Solution for x*x+-2x+15+-x+4=180 equation:


Simplifying
x * x + -2x + 15 + -1x + 4 = 180

Multiply x * x
x2 + -2x + 15 + -1x + 4 = 180

Reorder the terms:
15 + 4 + -2x + -1x + x2 = 180

Combine like terms: 15 + 4 = 19
19 + -2x + -1x + x2 = 180

Combine like terms: -2x + -1x = -3x
19 + -3x + x2 = 180

Solving
19 + -3x + x2 = 180

Solving for variable 'x'.

Reorder the terms:
19 + -180 + -3x + x2 = 180 + -180

Combine like terms: 19 + -180 = -161
-161 + -3x + x2 = 180 + -180

Combine like terms: 180 + -180 = 0
-161 + -3x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '161' to each side of the equation.
-161 + -3x + 161 + x2 = 0 + 161

Reorder the terms:
-161 + 161 + -3x + x2 = 0 + 161

Combine like terms: -161 + 161 = 0
0 + -3x + x2 = 0 + 161
-3x + x2 = 0 + 161

Combine like terms: 0 + 161 = 161
-3x + x2 = 161

The x term is -3x.  Take half its coefficient (-1.5).
Square it (2.25) and add it to both sides.

Add '2.25' to each side of the equation.
-3x + 2.25 + x2 = 161 + 2.25

Reorder the terms:
2.25 + -3x + x2 = 161 + 2.25

Combine like terms: 161 + 2.25 = 163.25
2.25 + -3x + x2 = 163.25

Factor a perfect square on the left side:
(x + -1.5)(x + -1.5) = 163.25

Calculate the square root of the right side: 12.776932339

Break this problem into two subproblems by setting 
(x + -1.5) equal to 12.776932339 and -12.776932339.

Subproblem 1

x + -1.5 = 12.776932339 Simplifying x + -1.5 = 12.776932339 Reorder the terms: -1.5 + x = 12.776932339 Solving -1.5 + x = 12.776932339 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.5' to each side of the equation. -1.5 + 1.5 + x = 12.776932339 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + x = 12.776932339 + 1.5 x = 12.776932339 + 1.5 Combine like terms: 12.776932339 + 1.5 = 14.276932339 x = 14.276932339 Simplifying x = 14.276932339

Subproblem 2

x + -1.5 = -12.776932339 Simplifying x + -1.5 = -12.776932339 Reorder the terms: -1.5 + x = -12.776932339 Solving -1.5 + x = -12.776932339 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.5' to each side of the equation. -1.5 + 1.5 + x = -12.776932339 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + x = -12.776932339 + 1.5 x = -12.776932339 + 1.5 Combine like terms: -12.776932339 + 1.5 = -11.276932339 x = -11.276932339 Simplifying x = -11.276932339

Solution

The solution to the problem is based on the solutions from the subproblems. x = {14.276932339, -11.276932339}

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