x^2-500x+625=400

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Solution for x^2-500x+625=400 equation:


Simplifying
x2 + -500x + 625 = 400

Reorder the terms:
625 + -500x + x2 = 400

Solving
625 + -500x + x2 = 400

Solving for variable 'x'.

Reorder the terms:
625 + -400 + -500x + x2 = 400 + -400

Combine like terms: 625 + -400 = 225
225 + -500x + x2 = 400 + -400

Combine like terms: 400 + -400 = 0
225 + -500x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-225' to each side of the equation.
225 + -500x + -225 + x2 = 0 + -225

Reorder the terms:
225 + -225 + -500x + x2 = 0 + -225

Combine like terms: 225 + -225 = 0
0 + -500x + x2 = 0 + -225
-500x + x2 = 0 + -225

Combine like terms: 0 + -225 = -225
-500x + x2 = -225

The x term is -500x.  Take half its coefficient (-250).
Square it (62500) and add it to both sides.

Add '62500' to each side of the equation.
-500x + 62500 + x2 = -225 + 62500

Reorder the terms:
62500 + -500x + x2 = -225 + 62500

Combine like terms: -225 + 62500 = 62275
62500 + -500x + x2 = 62275

Factor a perfect square on the left side:
(x + -250)(x + -250) = 62275

Calculate the square root of the right side: 249.549594269

Break this problem into two subproblems by setting 
(x + -250) equal to 249.549594269 and -249.549594269.

Subproblem 1

x + -250 = 249.549594269 Simplifying x + -250 = 249.549594269 Reorder the terms: -250 + x = 249.549594269 Solving -250 + x = 249.549594269 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '250' to each side of the equation. -250 + 250 + x = 249.549594269 + 250 Combine like terms: -250 + 250 = 0 0 + x = 249.549594269 + 250 x = 249.549594269 + 250 Combine like terms: 249.549594269 + 250 = 499.549594269 x = 499.549594269 Simplifying x = 499.549594269

Subproblem 2

x + -250 = -249.549594269 Simplifying x + -250 = -249.549594269 Reorder the terms: -250 + x = -249.549594269 Solving -250 + x = -249.549594269 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '250' to each side of the equation. -250 + 250 + x = -249.549594269 + 250 Combine like terms: -250 + 250 = 0 0 + x = -249.549594269 + 250 x = -249.549594269 + 250 Combine like terms: -249.549594269 + 250 = 0.450405731 x = 0.450405731 Simplifying x = 0.450405731

Solution

The solution to the problem is based on the solutions from the subproblems. x = {499.549594269, 0.450405731}

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