x^2+9x=250

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Solution for x^2+9x=250 equation:


Simplifying
x2 + 9x = 250

Reorder the terms:
9x + x2 = 250

Solving
9x + x2 = 250

Solving for variable 'x'.

Reorder the terms:
-250 + 9x + x2 = 250 + -250

Combine like terms: 250 + -250 = 0
-250 + 9x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '250' to each side of the equation.
-250 + 9x + 250 + x2 = 0 + 250

Reorder the terms:
-250 + 250 + 9x + x2 = 0 + 250

Combine like terms: -250 + 250 = 0
0 + 9x + x2 = 0 + 250
9x + x2 = 0 + 250

Combine like terms: 0 + 250 = 250
9x + x2 = 250

The x term is 9x.  Take half its coefficient (4.5).
Square it (20.25) and add it to both sides.

Add '20.25' to each side of the equation.
9x + 20.25 + x2 = 250 + 20.25

Reorder the terms:
20.25 + 9x + x2 = 250 + 20.25

Combine like terms: 250 + 20.25 = 270.25
20.25 + 9x + x2 = 270.25

Factor a perfect square on the left side:
(x + 4.5)(x + 4.5) = 270.25

Calculate the square root of the right side: 16.439282223

Break this problem into two subproblems by setting 
(x + 4.5) equal to 16.439282223 and -16.439282223.

Subproblem 1

x + 4.5 = 16.439282223 Simplifying x + 4.5 = 16.439282223 Reorder the terms: 4.5 + x = 16.439282223 Solving 4.5 + x = 16.439282223 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4.5' to each side of the equation. 4.5 + -4.5 + x = 16.439282223 + -4.5 Combine like terms: 4.5 + -4.5 = 0.0 0.0 + x = 16.439282223 + -4.5 x = 16.439282223 + -4.5 Combine like terms: 16.439282223 + -4.5 = 11.939282223 x = 11.939282223 Simplifying x = 11.939282223

Subproblem 2

x + 4.5 = -16.439282223 Simplifying x + 4.5 = -16.439282223 Reorder the terms: 4.5 + x = -16.439282223 Solving 4.5 + x = -16.439282223 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4.5' to each side of the equation. 4.5 + -4.5 + x = -16.439282223 + -4.5 Combine like terms: 4.5 + -4.5 = 0.0 0.0 + x = -16.439282223 + -4.5 x = -16.439282223 + -4.5 Combine like terms: -16.439282223 + -4.5 = -20.939282223 x = -20.939282223 Simplifying x = -20.939282223

Solution

The solution to the problem is based on the solutions from the subproblems. x = {11.939282223, -20.939282223}

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