x^2+5x=250

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Solution for x^2+5x=250 equation:


Simplifying
x2 + 5x = 250

Reorder the terms:
5x + x2 = 250

Solving
5x + x2 = 250

Solving for variable 'x'.

Reorder the terms:
-250 + 5x + x2 = 250 + -250

Combine like terms: 250 + -250 = 0
-250 + 5x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '250' to each side of the equation.
-250 + 5x + 250 + x2 = 0 + 250

Reorder the terms:
-250 + 250 + 5x + x2 = 0 + 250

Combine like terms: -250 + 250 = 0
0 + 5x + x2 = 0 + 250
5x + x2 = 0 + 250

Combine like terms: 0 + 250 = 250
5x + x2 = 250

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 = 250 + 6.25

Reorder the terms:
6.25 + 5x + x2 = 250 + 6.25

Combine like terms: 250 + 6.25 = 256.25
6.25 + 5x + x2 = 256.25

Factor a perfect square on the left side:
(x + 2.5)(x + 2.5) = 256.25

Calculate the square root of the right side: 16.007810594

Break this problem into two subproblems by setting 
(x + 2.5) equal to 16.007810594 and -16.007810594.

Subproblem 1

x + 2.5 = 16.007810594 Simplifying x + 2.5 = 16.007810594 Reorder the terms: 2.5 + x = 16.007810594 Solving 2.5 + x = 16.007810594 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 = 16.007810594 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + x = 16.007810594 + -2.5 x = 16.007810594 + -2.5 Combine like terms: 16.007810594 + -2.5 = 13.507810594 x = 13.507810594 Simplifying x = 13.507810594

Subproblem 2

x + 2.5 = -16.007810594 Simplifying x + 2.5 = -16.007810594 Reorder the terms: 2.5 + x = -16.007810594 Solving 2.5 + x = -16.007810594 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 = -16.007810594 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + x = -16.007810594 + -2.5 x = -16.007810594 + -2.5 Combine like terms: -16.007810594 + -2.5 = -18.507810594 x = -18.507810594 Simplifying x = -18.507810594

Solution

The solution to the problem is based on the solutions from the subproblems. x = {13.507810594, -18.507810594}

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