3495=0.05X^2-45X+12000

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Solution for 3495=0.05X^2-45X+12000 equation:


Simplifying
3495 = 0.05X2 + -45X + 12000

Reorder the terms:
3495 = 12000 + -45X + 0.05X2

Solving
3495 = 12000 + -45X + 0.05X2

Solving for variable 'X'.

Combine like terms: 3495 + -12000 = -8505
-8505 + 45X + -0.05X2 = 12000 + -45X + 0.05X2 + -12000 + 45X + -0.05X2

Reorder the terms:
-8505 + 45X + -0.05X2 = 12000 + -12000 + -45X + 45X + 0.05X2 + -0.05X2

Combine like terms: 12000 + -12000 = 0
-8505 + 45X + -0.05X2 = 0 + -45X + 45X + 0.05X2 + -0.05X2
-8505 + 45X + -0.05X2 = -45X + 45X + 0.05X2 + -0.05X2

Combine like terms: -45X + 45X = 0
-8505 + 45X + -0.05X2 = 0 + 0.05X2 + -0.05X2
-8505 + 45X + -0.05X2 = 0.05X2 + -0.05X2

Combine like terms: 0.05X2 + -0.05X2 = 0.00
-8505 + 45X + -0.05X2 = 0.00

Begin completing the square.  Divide all terms by
-0.05 the coefficient of the squared term: 

Divide each side by '-0.05'.
170100 + -900X + X2 = 0

Move the constant term to the right:

Add '-170100' to each side of the equation.
170100 + -900X + -170100 + X2 = 0 + -170100

Reorder the terms:
170100 + -170100 + -900X + X2 = 0 + -170100

Combine like terms: 170100 + -170100 = 0
0 + -900X + X2 = 0 + -170100
-900X + X2 = 0 + -170100

Combine like terms: 0 + -170100 = -170100
-900X + X2 = -170100

The X term is -900X.  Take half its coefficient (-450).
Square it (202500) and add it to both sides.

Add '202500' to each side of the equation.
-900X + 202500 + X2 = -170100 + 202500

Reorder the terms:
202500 + -900X + X2 = -170100 + 202500

Combine like terms: -170100 + 202500 = 32400
202500 + -900X + X2 = 32400

Factor a perfect square on the left side:
(X + -450)(X + -450) = 32400

Calculate the square root of the right side: 180

Break this problem into two subproblems by setting 
(X + -450) equal to 180 and -180.

Subproblem 1

X + -450 = 180 Simplifying X + -450 = 180 Reorder the terms: -450 + X = 180 Solving -450 + X = 180 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '450' to each side of the equation. -450 + 450 + X = 180 + 450 Combine like terms: -450 + 450 = 0 0 + X = 180 + 450 X = 180 + 450 Combine like terms: 180 + 450 = 630 X = 630 Simplifying X = 630

Subproblem 2

X + -450 = -180 Simplifying X + -450 = -180 Reorder the terms: -450 + X = -180 Solving -450 + X = -180 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '450' to each side of the equation. -450 + 450 + X = -180 + 450 Combine like terms: -450 + 450 = 0 0 + X = -180 + 450 X = -180 + 450 Combine like terms: -180 + 450 = 270 X = 270 Simplifying X = 270

Solution

The solution to the problem is based on the solutions from the subproblems. X = {630, 270}

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