-x^2+87x=600

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Solution for -x^2+87x=600 equation:


Simplifying
-1x2 + 87x = 600

Reorder the terms:
87x + -1x2 = 600

Solving
87x + -1x2 = 600

Solving for variable 'x'.

Reorder the terms:
-600 + 87x + -1x2 = 600 + -600

Combine like terms: 600 + -600 = 0
-600 + 87x + -1x2 = 0

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
600 + -87x + x2 = 0

Move the constant term to the right:

Add '-600' to each side of the equation.
600 + -87x + -600 + x2 = 0 + -600

Reorder the terms:
600 + -600 + -87x + x2 = 0 + -600

Combine like terms: 600 + -600 = 0
0 + -87x + x2 = 0 + -600
-87x + x2 = 0 + -600

Combine like terms: 0 + -600 = -600
-87x + x2 = -600

The x term is -87x.  Take half its coefficient (-43.5).
Square it (1892.25) and add it to both sides.

Add '1892.25' to each side of the equation.
-87x + 1892.25 + x2 = -600 + 1892.25

Reorder the terms:
1892.25 + -87x + x2 = -600 + 1892.25

Combine like terms: -600 + 1892.25 = 1292.25
1892.25 + -87x + x2 = 1292.25

Factor a perfect square on the left side:
(x + -43.5)(x + -43.5) = 1292.25

Calculate the square root of the right side: 35.947878936

Break this problem into two subproblems by setting 
(x + -43.5) equal to 35.947878936 and -35.947878936.

Subproblem 1

x + -43.5 = 35.947878936 Simplifying x + -43.5 = 35.947878936 Reorder the terms: -43.5 + x = 35.947878936 Solving -43.5 + x = 35.947878936 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '43.5' to each side of the equation. -43.5 + 43.5 + x = 35.947878936 + 43.5 Combine like terms: -43.5 + 43.5 = 0.0 0.0 + x = 35.947878936 + 43.5 x = 35.947878936 + 43.5 Combine like terms: 35.947878936 + 43.5 = 79.447878936 x = 79.447878936 Simplifying x = 79.447878936

Subproblem 2

x + -43.5 = -35.947878936 Simplifying x + -43.5 = -35.947878936 Reorder the terms: -43.5 + x = -35.947878936 Solving -43.5 + x = -35.947878936 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '43.5' to each side of the equation. -43.5 + 43.5 + x = -35.947878936 + 43.5 Combine like terms: -43.5 + 43.5 = 0.0 0.0 + x = -35.947878936 + 43.5 x = -35.947878936 + 43.5 Combine like terms: -35.947878936 + 43.5 = 7.552121064 x = 7.552121064 Simplifying x = 7.552121064

Solution

The solution to the problem is based on the solutions from the subproblems. x = {79.447878936, 7.552121064}

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