x^2+x-625=0

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Solution for x^2+x-625=0 equation:


Simplifying
x2 + x + -625 = 0

Reorder the terms:
-625 + x + x2 = 0

Solving
-625 + x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '625' to each side of the equation.
-625 + x + 625 + x2 = 0 + 625

Reorder the terms:
-625 + 625 + x + x2 = 0 + 625

Combine like terms: -625 + 625 = 0
0 + x + x2 = 0 + 625
x + x2 = 0 + 625

Combine like terms: 0 + 625 = 625
x + x2 = 625

The x term is x.  Take half its coefficient (0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
x + 0.25 + x2 = 625 + 0.25

Reorder the terms:
0.25 + x + x2 = 625 + 0.25

Combine like terms: 625 + 0.25 = 625.25
0.25 + x + x2 = 625.25

Factor a perfect square on the left side:
(x + 0.5)(x + 0.5) = 625.25

Calculate the square root of the right side: 25.0049995

Break this problem into two subproblems by setting 
(x + 0.5) equal to 25.0049995 and -25.0049995.

Subproblem 1

x + 0.5 = 25.0049995 Simplifying x + 0.5 = 25.0049995 Reorder the terms: 0.5 + x = 25.0049995 Solving 0.5 + x = 25.0049995 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = 25.0049995 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = 25.0049995 + -0.5 x = 25.0049995 + -0.5 Combine like terms: 25.0049995 + -0.5 = 24.5049995 x = 24.5049995 Simplifying x = 24.5049995

Subproblem 2

x + 0.5 = -25.0049995 Simplifying x + 0.5 = -25.0049995 Reorder the terms: 0.5 + x = -25.0049995 Solving 0.5 + x = -25.0049995 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = -25.0049995 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = -25.0049995 + -0.5 x = -25.0049995 + -0.5 Combine like terms: -25.0049995 + -0.5 = -25.5049995 x = -25.5049995 Simplifying x = -25.5049995

Solution

The solution to the problem is based on the solutions from the subproblems. x = {24.5049995, -25.5049995}

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