15000-160x+.1x^2=0

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Solution for 15000-160x+.1x^2=0 equation:


Simplifying
15000 + -160x + 0.1x2 = 0

Solving
15000 + -160x + 0.1x2 = 0

Solving for variable 'x'.

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

Divide each side by '0.1'.
150000 + -1600x + x2 = 0

Move the constant term to the right:

Add '-150000' to each side of the equation.
150000 + -1600x + -150000 + x2 = 0 + -150000

Reorder the terms:
150000 + -150000 + -1600x + x2 = 0 + -150000

Combine like terms: 150000 + -150000 = 0
0 + -1600x + x2 = 0 + -150000
-1600x + x2 = 0 + -150000

Combine like terms: 0 + -150000 = -150000
-1600x + x2 = -150000

The x term is -1600x.  Take half its coefficient (-800).
Square it (640000) and add it to both sides.

Add '640000' to each side of the equation.
-1600x + 640000 + x2 = -150000 + 640000

Reorder the terms:
640000 + -1600x + x2 = -150000 + 640000

Combine like terms: -150000 + 640000 = 490000
640000 + -1600x + x2 = 490000

Factor a perfect square on the left side:
(x + -800)(x + -800) = 490000

Calculate the square root of the right side: 700

Break this problem into two subproblems by setting 
(x + -800) equal to 700 and -700.

Subproblem 1

x + -800 = 700 Simplifying x + -800 = 700 Reorder the terms: -800 + x = 700 Solving -800 + x = 700 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '800' to each side of the equation. -800 + 800 + x = 700 + 800 Combine like terms: -800 + 800 = 0 0 + x = 700 + 800 x = 700 + 800 Combine like terms: 700 + 800 = 1500 x = 1500 Simplifying x = 1500

Subproblem 2

x + -800 = -700 Simplifying x + -800 = -700 Reorder the terms: -800 + x = -700 Solving -800 + x = -700 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '800' to each side of the equation. -800 + 800 + x = -700 + 800 Combine like terms: -800 + 800 = 0 0 + x = -700 + 800 x = -700 + 800 Combine like terms: -700 + 800 = 100 x = 100 Simplifying x = 100

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1500, 100}

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