180=45+x(2x-2)

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


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

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

Solving
180 = 45 + -2x + 2x2

Solving for variable 'x'.

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

Reorder the terms:
135 + 2x + -2x2 = 45 + -45 + -2x + 2x + 2x2 + -2x2

Combine like terms: 45 + -45 = 0
135 + 2x + -2x2 = 0 + -2x + 2x + 2x2 + -2x2
135 + 2x + -2x2 = -2x + 2x + 2x2 + -2x2

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

Combine like terms: 2x2 + -2x2 = 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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