-.02x^2+162x-16000=0

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Solution for -.02x^2+162x-16000=0 equation:


Simplifying
-0.02x2 + 162x + -16000 = 0

Reorder the terms:
-16000 + 162x + -0.02x2 = 0

Solving
-16000 + 162x + -0.02x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
-0.02 the coefficient of the squared term: 

Divide each side by '-0.02'.
800000 + -8100x + x2 = 0

Move the constant term to the right:

Add '-800000' to each side of the equation.
800000 + -8100x + -800000 + x2 = 0 + -800000

Reorder the terms:
800000 + -800000 + -8100x + x2 = 0 + -800000

Combine like terms: 800000 + -800000 = 0
0 + -8100x + x2 = 0 + -800000
-8100x + x2 = 0 + -800000

Combine like terms: 0 + -800000 = -800000
-8100x + x2 = -800000

The x term is -8100x.  Take half its coefficient (-4050).
Square it (16402500) and add it to both sides.

Add '16402500' to each side of the equation.
-8100x + 16402500 + x2 = -800000 + 16402500

Reorder the terms:
16402500 + -8100x + x2 = -800000 + 16402500

Combine like terms: -800000 + 16402500 = 15602500
16402500 + -8100x + x2 = 15602500

Factor a perfect square on the left side:
(x + -4050)(x + -4050) = 15602500

Calculate the square root of the right side: 3950

Break this problem into two subproblems by setting 
(x + -4050) equal to 3950 and -3950.

Subproblem 1

x + -4050 = 3950 Simplifying x + -4050 = 3950 Reorder the terms: -4050 + x = 3950 Solving -4050 + x = 3950 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4050' to each side of the equation. -4050 + 4050 + x = 3950 + 4050 Combine like terms: -4050 + 4050 = 0 0 + x = 3950 + 4050 x = 3950 + 4050 Combine like terms: 3950 + 4050 = 8000 x = 8000 Simplifying x = 8000

Subproblem 2

x + -4050 = -3950 Simplifying x + -4050 = -3950 Reorder the terms: -4050 + x = -3950 Solving -4050 + x = -3950 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4050' to each side of the equation. -4050 + 4050 + x = -3950 + 4050 Combine like terms: -4050 + 4050 = 0 0 + x = -3950 + 4050 x = -3950 + 4050 Combine like terms: -3950 + 4050 = 100 x = 100 Simplifying x = 100

Solution

The solution to the problem is based on the solutions from the subproblems. x = {8000, 100}

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