10x+200=x^2+5x

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Solution for 10x+200=x^2+5x equation:


Simplifying
10x + 200 = x2 + 5x

Reorder the terms:
200 + 10x = x2 + 5x

Reorder the terms:
200 + 10x = 5x + x2

Solving
200 + 10x = 5x + x2

Solving for variable 'x'.

Combine like terms: 10x + -5x = 5x
200 + 5x + -1x2 = 5x + x2 + -5x + -1x2

Reorder the terms:
200 + 5x + -1x2 = 5x + -5x + x2 + -1x2

Combine like terms: 5x + -5x = 0
200 + 5x + -1x2 = 0 + x2 + -1x2
200 + 5x + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
200 + 5x + -1x2 = 0

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

Divide each side by '-1'.
-200 + -5x + x2 = 0

Move the constant term to the right:

Add '200' to each side of the equation.
-200 + -5x + 200 + x2 = 0 + 200

Reorder the terms:
-200 + 200 + -5x + x2 = 0 + 200

Combine like terms: -200 + 200 = 0
0 + -5x + x2 = 0 + 200
-5x + x2 = 0 + 200

Combine like terms: 0 + 200 = 200
-5x + x2 = 200

The x term is -5x.  Take half its coefficient (-2.5).
Square it (6.25) and add it to both sides.

Add '6.25' to each side of the equation.
-5x + 6.25 + x2 = 200 + 6.25

Reorder the terms:
6.25 + -5x + x2 = 200 + 6.25

Combine like terms: 200 + 6.25 = 206.25
6.25 + -5x + x2 = 206.25

Factor a perfect square on the left side:
(x + -2.5)(x + -2.5) = 206.25

Calculate the square root of the right side: 14.361406616

Break this problem into two subproblems by setting 
(x + -2.5) equal to 14.361406616 and -14.361406616.

Subproblem 1

x + -2.5 = 14.361406616 Simplifying x + -2.5 = 14.361406616 Reorder the terms: -2.5 + x = 14.361406616 Solving -2.5 + x = 14.361406616 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.5' to each side of the equation. -2.5 + 2.5 + x = 14.361406616 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + x = 14.361406616 + 2.5 x = 14.361406616 + 2.5 Combine like terms: 14.361406616 + 2.5 = 16.861406616 x = 16.861406616 Simplifying x = 16.861406616

Subproblem 2

x + -2.5 = -14.361406616 Simplifying x + -2.5 = -14.361406616 Reorder the terms: -2.5 + x = -14.361406616 Solving -2.5 + x = -14.361406616 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.5' to each side of the equation. -2.5 + 2.5 + x = -14.361406616 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + x = -14.361406616 + 2.5 x = -14.361406616 + 2.5 Combine like terms: -14.361406616 + 2.5 = -11.861406616 x = -11.861406616 Simplifying x = -11.861406616

Solution

The solution to the problem is based on the solutions from the subproblems. x = {16.861406616, -11.861406616}

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