40x-x^2=99.584

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Solution for 40x-x^2=99.584 equation:


Simplifying
40x + -1x2 = 99.584

Solving
40x + -1x2 = 99.584

Solving for variable 'x'.

Reorder the terms:
-99.584 + 40x + -1x2 = 99.584 + -99.584

Combine like terms: 99.584 + -99.584 = 0.000
-99.584 + 40x + -1x2 = 0.000

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

Divide each side by '-1'.
99.584 + -40x + x2 = 0.000

Move the constant term to the right:

Add '-99.584' to each side of the equation.
99.584 + -40x + -99.584 + x2 = 0.000 + -99.584

Reorder the terms:
99.584 + -99.584 + -40x + x2 = 0.000 + -99.584

Combine like terms: 99.584 + -99.584 = 0.000
0.000 + -40x + x2 = 0.000 + -99.584
-40x + x2 = 0.000 + -99.584

Combine like terms: 0.000 + -99.584 = -99.584
-40x + x2 = -99.584

The x term is -40x.  Take half its coefficient (-20).
Square it (400) and add it to both sides.

Add '400' to each side of the equation.
-40x + 400 + x2 = -99.584 + 400

Reorder the terms:
400 + -40x + x2 = -99.584 + 400

Combine like terms: -99.584 + 400 = 300.416
400 + -40x + x2 = 300.416

Factor a perfect square on the left side:
(x + -20)(x + -20) = 300.416

Calculate the square root of the right side: 17.332512801

Break this problem into two subproblems by setting 
(x + -20) equal to 17.332512801 and -17.332512801.

Subproblem 1

x + -20 = 17.332512801 Simplifying x + -20 = 17.332512801 Reorder the terms: -20 + x = 17.332512801 Solving -20 + x = 17.332512801 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '20' to each side of the equation. -20 + 20 + x = 17.332512801 + 20 Combine like terms: -20 + 20 = 0 0 + x = 17.332512801 + 20 x = 17.332512801 + 20 Combine like terms: 17.332512801 + 20 = 37.332512801 x = 37.332512801 Simplifying x = 37.332512801

Subproblem 2

x + -20 = -17.332512801 Simplifying x + -20 = -17.332512801 Reorder the terms: -20 + x = -17.332512801 Solving -20 + x = -17.332512801 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '20' to each side of the equation. -20 + 20 + x = -17.332512801 + 20 Combine like terms: -20 + 20 = 0 0 + x = -17.332512801 + 20 x = -17.332512801 + 20 Combine like terms: -17.332512801 + 20 = 2.667487199 x = 2.667487199 Simplifying x = 2.667487199

Solution

The solution to the problem is based on the solutions from the subproblems. x = {37.332512801, 2.667487199}

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