20000=-0.5x^2+222x-160

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Solution for 20000=-0.5x^2+222x-160 equation:


Simplifying
20000 = -0.5x2 + 222x + -160

Reorder the terms:
20000 = -160 + 222x + -0.5x2

Solving
20000 = -160 + 222x + -0.5x2

Solving for variable 'x'.

Combine like terms: 20000 + 160 = 20160
20160 + -222x + 0.5x2 = -160 + 222x + -0.5x2 + 160 + -222x + 0.5x2

Reorder the terms:
20160 + -222x + 0.5x2 = -160 + 160 + 222x + -222x + -0.5x2 + 0.5x2

Combine like terms: -160 + 160 = 0
20160 + -222x + 0.5x2 = 0 + 222x + -222x + -0.5x2 + 0.5x2
20160 + -222x + 0.5x2 = 222x + -222x + -0.5x2 + 0.5x2

Combine like terms: 222x + -222x = 0
20160 + -222x + 0.5x2 = 0 + -0.5x2 + 0.5x2
20160 + -222x + 0.5x2 = -0.5x2 + 0.5x2

Combine like terms: -0.5x2 + 0.5x2 = 0.0
20160 + -222x + 0.5x2 = 0.0

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

Divide each side by '0.5'.
40320 + -444x + x2 = 0

Move the constant term to the right:

Add '-40320' to each side of the equation.
40320 + -444x + -40320 + x2 = 0 + -40320

Reorder the terms:
40320 + -40320 + -444x + x2 = 0 + -40320

Combine like terms: 40320 + -40320 = 0
0 + -444x + x2 = 0 + -40320
-444x + x2 = 0 + -40320

Combine like terms: 0 + -40320 = -40320
-444x + x2 = -40320

The x term is -444x.  Take half its coefficient (-222).
Square it (49284) and add it to both sides.

Add '49284' to each side of the equation.
-444x + 49284 + x2 = -40320 + 49284

Reorder the terms:
49284 + -444x + x2 = -40320 + 49284

Combine like terms: -40320 + 49284 = 8964
49284 + -444x + x2 = 8964

Factor a perfect square on the left side:
(x + -222)(x + -222) = 8964

Calculate the square root of the right side: 94.678403028

Break this problem into two subproblems by setting 
(x + -222) equal to 94.678403028 and -94.678403028.

Subproblem 1

x + -222 = 94.678403028 Simplifying x + -222 = 94.678403028 Reorder the terms: -222 + x = 94.678403028 Solving -222 + x = 94.678403028 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '222' to each side of the equation. -222 + 222 + x = 94.678403028 + 222 Combine like terms: -222 + 222 = 0 0 + x = 94.678403028 + 222 x = 94.678403028 + 222 Combine like terms: 94.678403028 + 222 = 316.678403028 x = 316.678403028 Simplifying x = 316.678403028

Subproblem 2

x + -222 = -94.678403028 Simplifying x + -222 = -94.678403028 Reorder the terms: -222 + x = -94.678403028 Solving -222 + x = -94.678403028 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '222' to each side of the equation. -222 + 222 + x = -94.678403028 + 222 Combine like terms: -222 + 222 = 0 0 + x = -94.678403028 + 222 x = -94.678403028 + 222 Combine like terms: -94.678403028 + 222 = 127.321596972 x = 127.321596972 Simplifying x = 127.321596972

Solution

The solution to the problem is based on the solutions from the subproblems. x = {316.678403028, 127.321596972}

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