x^2-9x-8250=0

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Solution for x^2-9x-8250=0 equation:


Simplifying
x2 + -9x + -8250 = 0

Reorder the terms:
-8250 + -9x + x2 = 0

Solving
-8250 + -9x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '8250' to each side of the equation.
-8250 + -9x + 8250 + x2 = 0 + 8250

Reorder the terms:
-8250 + 8250 + -9x + x2 = 0 + 8250

Combine like terms: -8250 + 8250 = 0
0 + -9x + x2 = 0 + 8250
-9x + x2 = 0 + 8250

Combine like terms: 0 + 8250 = 8250
-9x + x2 = 8250

The x term is -9x.  Take half its coefficient (-4.5).
Square it (20.25) and add it to both sides.

Add '20.25' to each side of the equation.
-9x + 20.25 + x2 = 8250 + 20.25

Reorder the terms:
20.25 + -9x + x2 = 8250 + 20.25

Combine like terms: 8250 + 20.25 = 8270.25
20.25 + -9x + x2 = 8270.25

Factor a perfect square on the left side:
(x + -4.5)(x + -4.5) = 8270.25

Calculate the square root of the right side: 90.940914884

Break this problem into two subproblems by setting 
(x + -4.5) equal to 90.940914884 and -90.940914884.

Subproblem 1

x + -4.5 = 90.940914884 Simplifying x + -4.5 = 90.940914884 Reorder the terms: -4.5 + x = 90.940914884 Solving -4.5 + x = 90.940914884 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4.5' to each side of the equation. -4.5 + 4.5 + x = 90.940914884 + 4.5 Combine like terms: -4.5 + 4.5 = 0.0 0.0 + x = 90.940914884 + 4.5 x = 90.940914884 + 4.5 Combine like terms: 90.940914884 + 4.5 = 95.440914884 x = 95.440914884 Simplifying x = 95.440914884

Subproblem 2

x + -4.5 = -90.940914884 Simplifying x + -4.5 = -90.940914884 Reorder the terms: -4.5 + x = -90.940914884 Solving -4.5 + x = -90.940914884 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4.5' to each side of the equation. -4.5 + 4.5 + x = -90.940914884 + 4.5 Combine like terms: -4.5 + 4.5 = 0.0 0.0 + x = -90.940914884 + 4.5 x = -90.940914884 + 4.5 Combine like terms: -90.940914884 + 4.5 = -86.440914884 x = -86.440914884 Simplifying x = -86.440914884

Solution

The solution to the problem is based on the solutions from the subproblems. x = {95.440914884, -86.440914884}

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