x^2-625x-256=0

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Solution for x^2-625x-256=0 equation:


Simplifying
x2 + -625x + -256 = 0

Reorder the terms:
-256 + -625x + x2 = 0

Solving
-256 + -625x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '256' to each side of the equation.
-256 + -625x + 256 + x2 = 0 + 256

Reorder the terms:
-256 + 256 + -625x + x2 = 0 + 256

Combine like terms: -256 + 256 = 0
0 + -625x + x2 = 0 + 256
-625x + x2 = 0 + 256

Combine like terms: 0 + 256 = 256
-625x + x2 = 256

The x term is -625x.  Take half its coefficient (-312.5).
Square it (97656.25) and add it to both sides.

Add '97656.25' to each side of the equation.
-625x + 97656.25 + x2 = 256 + 97656.25

Reorder the terms:
97656.25 + -625x + x2 = 256 + 97656.25

Combine like terms: 256 + 97656.25 = 97912.25
97656.25 + -625x + x2 = 97912.25

Factor a perfect square on the left side:
(x + -312.5)(x + -312.5) = 97912.25

Calculate the square root of the right side: 312.909331916

Break this problem into two subproblems by setting 
(x + -312.5) equal to 312.909331916 and -312.909331916.

Subproblem 1

x + -312.5 = 312.909331916 Simplifying x + -312.5 = 312.909331916 Reorder the terms: -312.5 + x = 312.909331916 Solving -312.5 + x = 312.909331916 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '312.5' to each side of the equation. -312.5 + 312.5 + x = 312.909331916 + 312.5 Combine like terms: -312.5 + 312.5 = 0.0 0.0 + x = 312.909331916 + 312.5 x = 312.909331916 + 312.5 Combine like terms: 312.909331916 + 312.5 = 625.409331916 x = 625.409331916 Simplifying x = 625.409331916

Subproblem 2

x + -312.5 = -312.909331916 Simplifying x + -312.5 = -312.909331916 Reorder the terms: -312.5 + x = -312.909331916 Solving -312.5 + x = -312.909331916 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '312.5' to each side of the equation. -312.5 + 312.5 + x = -312.909331916 + 312.5 Combine like terms: -312.5 + 312.5 = 0.0 0.0 + x = -312.909331916 + 312.5 x = -312.909331916 + 312.5 Combine like terms: -312.909331916 + 312.5 = -0.409331916 x = -0.409331916 Simplifying x = -0.409331916

Solution

The solution to the problem is based on the solutions from the subproblems. x = {625.409331916, -0.409331916}

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