68=28x-x^2

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Solution for 68=28x-x^2 equation:


Simplifying
68 = 28x + -1x2

Solving
68 = 28x + -1x2

Solving for variable 'x'.

Reorder the terms:
68 + -28x + x2 = 28x + -28x + -1x2 + x2

Combine like terms: 28x + -28x = 0
68 + -28x + x2 = 0 + -1x2 + x2
68 + -28x + x2 = -1x2 + x2

Combine like terms: -1x2 + x2 = 0
68 + -28x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-68' to each side of the equation.
68 + -28x + -68 + x2 = 0 + -68

Reorder the terms:
68 + -68 + -28x + x2 = 0 + -68

Combine like terms: 68 + -68 = 0
0 + -28x + x2 = 0 + -68
-28x + x2 = 0 + -68

Combine like terms: 0 + -68 = -68
-28x + x2 = -68

The x term is -28x.  Take half its coefficient (-14).
Square it (196) and add it to both sides.

Add '196' to each side of the equation.
-28x + 196 + x2 = -68 + 196

Reorder the terms:
196 + -28x + x2 = -68 + 196

Combine like terms: -68 + 196 = 128
196 + -28x + x2 = 128

Factor a perfect square on the left side:
(x + -14)(x + -14) = 128

Calculate the square root of the right side: 11.313708499

Break this problem into two subproblems by setting 
(x + -14) equal to 11.313708499 and -11.313708499.

Subproblem 1

x + -14 = 11.313708499 Simplifying x + -14 = 11.313708499 Reorder the terms: -14 + x = 11.313708499 Solving -14 + x = 11.313708499 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '14' to each side of the equation. -14 + 14 + x = 11.313708499 + 14 Combine like terms: -14 + 14 = 0 0 + x = 11.313708499 + 14 x = 11.313708499 + 14 Combine like terms: 11.313708499 + 14 = 25.313708499 x = 25.313708499 Simplifying x = 25.313708499

Subproblem 2

x + -14 = -11.313708499 Simplifying x + -14 = -11.313708499 Reorder the terms: -14 + x = -11.313708499 Solving -14 + x = -11.313708499 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '14' to each side of the equation. -14 + 14 + x = -11.313708499 + 14 Combine like terms: -14 + 14 = 0 0 + x = -11.313708499 + 14 x = -11.313708499 + 14 Combine like terms: -11.313708499 + 14 = 2.686291501 x = 2.686291501 Simplifying x = 2.686291501

Solution

The solution to the problem is based on the solutions from the subproblems. x = {25.313708499, 2.686291501}

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