1200-45x+.2x^2=0

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Solution for 1200-45x+.2x^2=0 equation:


Simplifying
1200 + -45x + 0.2x2 = 0

Solving
1200 + -45x + 0.2x2 = 0

Solving for variable 'x'.

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

Divide each side by '0.2'.
6000 + -225x + x2 = 0

Move the constant term to the right:

Add '-6000' to each side of the equation.
6000 + -225x + -6000 + x2 = 0 + -6000

Reorder the terms:
6000 + -6000 + -225x + x2 = 0 + -6000

Combine like terms: 6000 + -6000 = 0
0 + -225x + x2 = 0 + -6000
-225x + x2 = 0 + -6000

Combine like terms: 0 + -6000 = -6000
-225x + x2 = -6000

The x term is -225x.  Take half its coefficient (-112.5).
Square it (12656.25) and add it to both sides.

Add '12656.25' to each side of the equation.
-225x + 12656.25 + x2 = -6000 + 12656.25

Reorder the terms:
12656.25 + -225x + x2 = -6000 + 12656.25

Combine like terms: -6000 + 12656.25 = 6656.25
12656.25 + -225x + x2 = 6656.25

Factor a perfect square on the left side:
(x + -112.5)(x + -112.5) = 6656.25

Calculate the square root of the right side: 81.58584436

Break this problem into two subproblems by setting 
(x + -112.5) equal to 81.58584436 and -81.58584436.

Subproblem 1

x + -112.5 = 81.58584436 Simplifying x + -112.5 = 81.58584436 Reorder the terms: -112.5 + x = 81.58584436 Solving -112.5 + x = 81.58584436 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '112.5' to each side of the equation. -112.5 + 112.5 + x = 81.58584436 + 112.5 Combine like terms: -112.5 + 112.5 = 0.0 0.0 + x = 81.58584436 + 112.5 x = 81.58584436 + 112.5 Combine like terms: 81.58584436 + 112.5 = 194.08584436 x = 194.08584436 Simplifying x = 194.08584436

Subproblem 2

x + -112.5 = -81.58584436 Simplifying x + -112.5 = -81.58584436 Reorder the terms: -112.5 + x = -81.58584436 Solving -112.5 + x = -81.58584436 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '112.5' to each side of the equation. -112.5 + 112.5 + x = -81.58584436 + 112.5 Combine like terms: -112.5 + 112.5 = 0.0 0.0 + x = -81.58584436 + 112.5 x = -81.58584436 + 112.5 Combine like terms: -81.58584436 + 112.5 = 30.91415564 x = 30.91415564 Simplifying x = 30.91415564

Solution

The solution to the problem is based on the solutions from the subproblems. x = {194.08584436, 30.91415564}

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