x(2x-2)+45=180

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Solution for x(2x-2)+45=180 equation:


Simplifying
x(2x + -2) + 45 = 180

Reorder the terms:
x(-2 + 2x) + 45 = 180
(-2 * x + 2x * x) + 45 = 180
(-2x + 2x2) + 45 = 180

Reorder the terms:
45 + -2x + 2x2 = 180

Solving
45 + -2x + 2x2 = 180

Solving for variable 'x'.

Reorder the terms:
45 + -180 + -2x + 2x2 = 180 + -180

Combine like terms: 45 + -180 = -135
-135 + -2x + 2x2 = 180 + -180

Combine like terms: 180 + -180 = 0
-135 + -2x + 2x2 = 0

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

Divide each side by '2'.
-67.5 + -1x + x2 = 0

Move the constant term to the right:

Add '67.5' to each side of the equation.
-67.5 + -1x + 67.5 + x2 = 0 + 67.5

Reorder the terms:
-67.5 + 67.5 + -1x + x2 = 0 + 67.5

Combine like terms: -67.5 + 67.5 = 0.0
0.0 + -1x + x2 = 0 + 67.5
-1x + x2 = 0 + 67.5

Combine like terms: 0 + 67.5 = 67.5
-1x + x2 = 67.5

The x term is -1x.  Take half its coefficient (-0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
-1x + 0.25 + x2 = 67.5 + 0.25

Reorder the terms:
0.25 + -1x + x2 = 67.5 + 0.25

Combine like terms: 67.5 + 0.25 = 67.75
0.25 + -1x + x2 = 67.75

Factor a perfect square on the left side:
(x + -0.5)(x + -0.5) = 67.75

Calculate the square root of the right side: 8.231038817

Break this problem into two subproblems by setting 
(x + -0.5) equal to 8.231038817 and -8.231038817.

Subproblem 1

x + -0.5 = 8.231038817 Simplifying x + -0.5 = 8.231038817 Reorder the terms: -0.5 + x = 8.231038817 Solving -0.5 + x = 8.231038817 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.5' to each side of the equation. -0.5 + 0.5 + x = 8.231038817 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + x = 8.231038817 + 0.5 x = 8.231038817 + 0.5 Combine like terms: 8.231038817 + 0.5 = 8.731038817 x = 8.731038817 Simplifying x = 8.731038817

Subproblem 2

x + -0.5 = -8.231038817 Simplifying x + -0.5 = -8.231038817 Reorder the terms: -0.5 + x = -8.231038817 Solving -0.5 + x = -8.231038817 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.5' to each side of the equation. -0.5 + 0.5 + x = -8.231038817 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + x = -8.231038817 + 0.5 x = -8.231038817 + 0.5 Combine like terms: -8.231038817 + 0.5 = -7.731038817 x = -7.731038817 Simplifying x = -7.731038817

Solution

The solution to the problem is based on the solutions from the subproblems. x = {8.731038817, -7.731038817}

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