20x=x^2+2

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Solution for 20x=x^2+2 equation:


Simplifying
20x = x2 + 2

Reorder the terms:
20x = 2 + x2

Solving
20x = 2 + x2

Solving for variable 'x'.

Reorder the terms:
-2 + 20x + -1x2 = 2 + x2 + -2 + -1x2

Reorder the terms:
-2 + 20x + -1x2 = 2 + -2 + x2 + -1x2

Combine like terms: 2 + -2 = 0
-2 + 20x + -1x2 = 0 + x2 + -1x2
-2 + 20x + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
-2 + 20x + -1x2 = 0

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

Divide each side by '-1'.
2 + -20x + x2 = 0

Move the constant term to the right:

Add '-2' to each side of the equation.
2 + -20x + -2 + x2 = 0 + -2

Reorder the terms:
2 + -2 + -20x + x2 = 0 + -2

Combine like terms: 2 + -2 = 0
0 + -20x + x2 = 0 + -2
-20x + x2 = 0 + -2

Combine like terms: 0 + -2 = -2
-20x + x2 = -2

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 = -2 + 100

Reorder the terms:
100 + -20x + x2 = -2 + 100

Combine like terms: -2 + 100 = 98
100 + -20x + x2 = 98

Factor a perfect square on the left side:
(x + -10)(x + -10) = 98

Calculate the square root of the right side: 9.899494937

Break this problem into two subproblems by setting 
(x + -10) equal to 9.899494937 and -9.899494937.

Subproblem 1

x + -10 = 9.899494937 Simplifying x + -10 = 9.899494937 Reorder the terms: -10 + x = 9.899494937 Solving -10 + x = 9.899494937 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 = 9.899494937 + 10 Combine like terms: -10 + 10 = 0 0 + x = 9.899494937 + 10 x = 9.899494937 + 10 Combine like terms: 9.899494937 + 10 = 19.899494937 x = 19.899494937 Simplifying x = 19.899494937

Subproblem 2

x + -10 = -9.899494937 Simplifying x + -10 = -9.899494937 Reorder the terms: -10 + x = -9.899494937 Solving -10 + x = -9.899494937 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 = -9.899494937 + 10 Combine like terms: -10 + 10 = 0 0 + x = -9.899494937 + 10 x = -9.899494937 + 10 Combine like terms: -9.899494937 + 10 = 0.100505063 x = 0.100505063 Simplifying x = 0.100505063

Solution

The solution to the problem is based on the solutions from the subproblems. x = {19.899494937, 0.100505063}

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