x^2-400x+7500=0

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Solution for x^2-400x+7500=0 equation:


Simplifying
x2 + -400x + 7500 = 0

Reorder the terms:
7500 + -400x + x2 = 0

Solving
7500 + -400x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '-7500' to each side of the equation.
7500 + -400x + -7500 + x2 = 0 + -7500

Reorder the terms:
7500 + -7500 + -400x + x2 = 0 + -7500

Combine like terms: 7500 + -7500 = 0
0 + -400x + x2 = 0 + -7500
-400x + x2 = 0 + -7500

Combine like terms: 0 + -7500 = -7500
-400x + x2 = -7500

The x term is -400x.  Take half its coefficient (-200).
Square it (40000) and add it to both sides.

Add '40000' to each side of the equation.
-400x + 40000 + x2 = -7500 + 40000

Reorder the terms:
40000 + -400x + x2 = -7500 + 40000

Combine like terms: -7500 + 40000 = 32500
40000 + -400x + x2 = 32500

Factor a perfect square on the left side:
(x + -200)(x + -200) = 32500

Calculate the square root of the right side: 180.277563773

Break this problem into two subproblems by setting 
(x + -200) equal to 180.277563773 and -180.277563773.

Subproblem 1

x + -200 = 180.277563773 Simplifying x + -200 = 180.277563773 Reorder the terms: -200 + x = 180.277563773 Solving -200 + x = 180.277563773 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '200' to each side of the equation. -200 + 200 + x = 180.277563773 + 200 Combine like terms: -200 + 200 = 0 0 + x = 180.277563773 + 200 x = 180.277563773 + 200 Combine like terms: 180.277563773 + 200 = 380.277563773 x = 380.277563773 Simplifying x = 380.277563773

Subproblem 2

x + -200 = -180.277563773 Simplifying x + -200 = -180.277563773 Reorder the terms: -200 + x = -180.277563773 Solving -200 + x = -180.277563773 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '200' to each side of the equation. -200 + 200 + x = -180.277563773 + 200 Combine like terms: -200 + 200 = 0 0 + x = -180.277563773 + 200 x = -180.277563773 + 200 Combine like terms: -180.277563773 + 200 = 19.722436227 x = 19.722436227 Simplifying x = 19.722436227

Solution

The solution to the problem is based on the solutions from the subproblems. x = {380.277563773, 19.722436227}

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