=0.5X^2-55X+1000

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Solution for =0.5X^2-55X+1000 equation:


Simplifying
0 = 0.5X2 + -55X + 1000

Reorder the terms:
0 = 1000 + -55X + 0.5X2

Solving
0 = 1000 + -55X + 0.5X2

Solving for variable 'X'.

Combine like terms: 0 + -1000 = -1000
-1000 + 55X + -0.5X2 = 1000 + -55X + 0.5X2 + -1000 + 55X + -0.5X2

Reorder the terms:
-1000 + 55X + -0.5X2 = 1000 + -1000 + -55X + 55X + 0.5X2 + -0.5X2

Combine like terms: 1000 + -1000 = 0
-1000 + 55X + -0.5X2 = 0 + -55X + 55X + 0.5X2 + -0.5X2
-1000 + 55X + -0.5X2 = -55X + 55X + 0.5X2 + -0.5X2

Combine like terms: -55X + 55X = 0
-1000 + 55X + -0.5X2 = 0 + 0.5X2 + -0.5X2
-1000 + 55X + -0.5X2 = 0.5X2 + -0.5X2

Combine like terms: 0.5X2 + -0.5X2 = 0.0
-1000 + 55X + -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'.
2000 + -110X + X2 = 0

Move the constant term to the right:

Add '-2000' to each side of the equation.
2000 + -110X + -2000 + X2 = 0 + -2000

Reorder the terms:
2000 + -2000 + -110X + X2 = 0 + -2000

Combine like terms: 2000 + -2000 = 0
0 + -110X + X2 = 0 + -2000
-110X + X2 = 0 + -2000

Combine like terms: 0 + -2000 = -2000
-110X + X2 = -2000

The X term is -110X.  Take half its coefficient (-55).
Square it (3025) and add it to both sides.

Add '3025' to each side of the equation.
-110X + 3025 + X2 = -2000 + 3025

Reorder the terms:
3025 + -110X + X2 = -2000 + 3025

Combine like terms: -2000 + 3025 = 1025
3025 + -110X + X2 = 1025

Factor a perfect square on the left side:
(X + -55)(X + -55) = 1025

Calculate the square root of the right side: 32.015621187

Break this problem into two subproblems by setting 
(X + -55) equal to 32.015621187 and -32.015621187.

Subproblem 1

X + -55 = 32.015621187 Simplifying X + -55 = 32.015621187 Reorder the terms: -55 + X = 32.015621187 Solving -55 + X = 32.015621187 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '55' to each side of the equation. -55 + 55 + X = 32.015621187 + 55 Combine like terms: -55 + 55 = 0 0 + X = 32.015621187 + 55 X = 32.015621187 + 55 Combine like terms: 32.015621187 + 55 = 87.015621187 X = 87.015621187 Simplifying X = 87.015621187

Subproblem 2

X + -55 = -32.015621187 Simplifying X + -55 = -32.015621187 Reorder the terms: -55 + X = -32.015621187 Solving -55 + X = -32.015621187 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '55' to each side of the equation. -55 + 55 + X = -32.015621187 + 55 Combine like terms: -55 + 55 = 0 0 + X = -32.015621187 + 55 X = -32.015621187 + 55 Combine like terms: -32.015621187 + 55 = 22.984378813 X = 22.984378813 Simplifying X = 22.984378813

Solution

The solution to the problem is based on the solutions from the subproblems. X = {87.015621187, 22.984378813}

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