20x-50-x^2=0

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Solution for 20x-50-x^2=0 equation:


Simplifying
20x + -50 + -1x2 = 0

Reorder the terms:
-50 + 20x + -1x2 = 0

Solving
-50 + 20x + -1x2 = 0

Solving for variable 'x'.

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

Divide each side by '-1'.
50 + -20x + x2 = 0

Move the constant term to the right:

Add '-50' to each side of the equation.
50 + -20x + -50 + x2 = 0 + -50

Reorder the terms:
50 + -50 + -20x + x2 = 0 + -50

Combine like terms: 50 + -50 = 0
0 + -20x + x2 = 0 + -50
-20x + x2 = 0 + -50

Combine like terms: 0 + -50 = -50
-20x + x2 = -50

The x term is -20x.  Take half its coefficient (-10).
Square it (100) and add it to both sides.

Add '100' to each side of the equation.
-20x + 100 + x2 = -50 + 100

Reorder the terms:
100 + -20x + x2 = -50 + 100

Combine like terms: -50 + 100 = 50
100 + -20x + x2 = 50

Factor a perfect square on the left side:
(x + -10)(x + -10) = 50

Calculate the square root of the right side: 7.071067812

Break this problem into two subproblems by setting 
(x + -10) equal to 7.071067812 and -7.071067812.

Subproblem 1

x + -10 = 7.071067812 Simplifying x + -10 = 7.071067812 Reorder the terms: -10 + x = 7.071067812 Solving -10 + x = 7.071067812 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '10' to each side of the equation. -10 + 10 + x = 7.071067812 + 10 Combine like terms: -10 + 10 = 0 0 + x = 7.071067812 + 10 x = 7.071067812 + 10 Combine like terms: 7.071067812 + 10 = 17.071067812 x = 17.071067812 Simplifying x = 17.071067812

Subproblem 2

x + -10 = -7.071067812 Simplifying x + -10 = -7.071067812 Reorder the terms: -10 + x = -7.071067812 Solving -10 + x = -7.071067812 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '10' to each side of the equation. -10 + 10 + x = -7.071067812 + 10 Combine like terms: -10 + 10 = 0 0 + x = -7.071067812 + 10 x = -7.071067812 + 10 Combine like terms: -7.071067812 + 10 = 2.928932188 x = 2.928932188 Simplifying x = 2.928932188

Solution

The solution to the problem is based on the solutions from the subproblems. x = {17.071067812, 2.928932188}

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