180x+x^2=45

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Solution for 180x+x^2=45 equation:


Simplifying
180x + x2 = 45

Solving
180x + x2 = 45

Solving for variable 'x'.

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

Combine like terms: 45 + -45 = 0
-45 + 180x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '45' to each side of the equation.
-45 + 180x + 45 + x2 = 0 + 45

Reorder the terms:
-45 + 45 + 180x + x2 = 0 + 45

Combine like terms: -45 + 45 = 0
0 + 180x + x2 = 0 + 45
180x + x2 = 0 + 45

Combine like terms: 0 + 45 = 45
180x + x2 = 45

The x term is 180x.  Take half its coefficient (90).
Square it (8100) and add it to both sides.

Add '8100' to each side of the equation.
180x + 8100 + x2 = 45 + 8100

Reorder the terms:
8100 + 180x + x2 = 45 + 8100

Combine like terms: 45 + 8100 = 8145
8100 + 180x + x2 = 8145

Factor a perfect square on the left side:
(x + 90)(x + 90) = 8145

Calculate the square root of the right side: 90.249653739

Break this problem into two subproblems by setting 
(x + 90) equal to 90.249653739 and -90.249653739.

Subproblem 1

x + 90 = 90.249653739 Simplifying x + 90 = 90.249653739 Reorder the terms: 90 + x = 90.249653739 Solving 90 + x = 90.249653739 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-90' to each side of the equation. 90 + -90 + x = 90.249653739 + -90 Combine like terms: 90 + -90 = 0 0 + x = 90.249653739 + -90 x = 90.249653739 + -90 Combine like terms: 90.249653739 + -90 = 0.249653739 x = 0.249653739 Simplifying x = 0.249653739

Subproblem 2

x + 90 = -90.249653739 Simplifying x + 90 = -90.249653739 Reorder the terms: 90 + x = -90.249653739 Solving 90 + x = -90.249653739 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-90' to each side of the equation. 90 + -90 + x = -90.249653739 + -90 Combine like terms: 90 + -90 = 0 0 + x = -90.249653739 + -90 x = -90.249653739 + -90 Combine like terms: -90.249653739 + -90 = -180.249653739 x = -180.249653739 Simplifying x = -180.249653739

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.249653739, -180.249653739}

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