0=.45x^2+6x-9075

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Solution for 0=.45x^2+6x-9075 equation:


Simplifying
0 = 0.45x2 + 6x + -9075

Reorder the terms:
0 = -9075 + 6x + 0.45x2

Solving
0 = -9075 + 6x + 0.45x2

Solving for variable 'x'.

Combine like terms: 0 + 9075 = 9075
9075 + -6x + -0.45x2 = -9075 + 6x + 0.45x2 + 9075 + -6x + -0.45x2

Reorder the terms:
9075 + -6x + -0.45x2 = -9075 + 9075 + 6x + -6x + 0.45x2 + -0.45x2

Combine like terms: -9075 + 9075 = 0
9075 + -6x + -0.45x2 = 0 + 6x + -6x + 0.45x2 + -0.45x2
9075 + -6x + -0.45x2 = 6x + -6x + 0.45x2 + -0.45x2

Combine like terms: 6x + -6x = 0
9075 + -6x + -0.45x2 = 0 + 0.45x2 + -0.45x2
9075 + -6x + -0.45x2 = 0.45x2 + -0.45x2

Combine like terms: 0.45x2 + -0.45x2 = 0.00
9075 + -6x + -0.45x2 = 0.00

Begin completing the square.  Divide all terms by
-0.45 the coefficient of the squared term: 

Divide each side by '-0.45'.
-20166.66667 + 13.33333333x + x2 = 0

Move the constant term to the right:

Add '20166.66667' to each side of the equation.
-20166.66667 + 13.33333333x + 20166.66667 + x2 = 0 + 20166.66667

Reorder the terms:
-20166.66667 + 20166.66667 + 13.33333333x + x2 = 0 + 20166.66667

Combine like terms: -20166.66667 + 20166.66667 = 0.00000
0.00000 + 13.33333333x + x2 = 0 + 20166.66667
13.33333333x + x2 = 0 + 20166.66667

Combine like terms: 0 + 20166.66667 = 20166.66667
13.33333333x + x2 = 20166.66667

The x term is 13.33333333x.  Take half its coefficient (6.666666665).
Square it (44.44444442) and add it to both sides.

Add '44.44444442' to each side of the equation.
13.33333333x + 44.44444442 + x2 = 20166.66667 + 44.44444442

Reorder the terms:
44.44444442 + 13.33333333x + x2 = 20166.66667 + 44.44444442

Combine like terms: 20166.66667 + 44.44444442 = 20211.11111442
44.44444442 + 13.33333333x + x2 = 20211.11111442

Factor a perfect square on the left side:
(x + 6.666666665)(x + 6.666666665) = 20211.11111442

Calculate the square root of the right side: 142.165787426

Break this problem into two subproblems by setting 
(x + 6.666666665) equal to 142.165787426 and -142.165787426.

Subproblem 1

x + 6.666666665 = 142.165787426 Simplifying x + 6.666666665 = 142.165787426 Reorder the terms: 6.666666665 + x = 142.165787426 Solving 6.666666665 + x = 142.165787426 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-6.666666665' to each side of the equation. 6.666666665 + -6.666666665 + x = 142.165787426 + -6.666666665 Combine like terms: 6.666666665 + -6.666666665 = 0.000000000 0.000000000 + x = 142.165787426 + -6.666666665 x = 142.165787426 + -6.666666665 Combine like terms: 142.165787426 + -6.666666665 = 135.499120761 x = 135.499120761 Simplifying x = 135.499120761

Subproblem 2

x + 6.666666665 = -142.165787426 Simplifying x + 6.666666665 = -142.165787426 Reorder the terms: 6.666666665 + x = -142.165787426 Solving 6.666666665 + x = -142.165787426 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-6.666666665' to each side of the equation. 6.666666665 + -6.666666665 + x = -142.165787426 + -6.666666665 Combine like terms: 6.666666665 + -6.666666665 = 0.000000000 0.000000000 + x = -142.165787426 + -6.666666665 x = -142.165787426 + -6.666666665 Combine like terms: -142.165787426 + -6.666666665 = -148.832454091 x = -148.832454091 Simplifying x = -148.832454091

Solution

The solution to the problem is based on the solutions from the subproblems. x = {135.499120761, -148.832454091}

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