x^2-9x-763=0

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Solution for x^2-9x-763=0 equation:


Simplifying
x2 + -9x + -763 = 0

Reorder the terms:
-763 + -9x + x2 = 0

Solving
-763 + -9x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '763' to each side of the equation.
-763 + -9x + 763 + x2 = 0 + 763

Reorder the terms:
-763 + 763 + -9x + x2 = 0 + 763

Combine like terms: -763 + 763 = 0
0 + -9x + x2 = 0 + 763
-9x + x2 = 0 + 763

Combine like terms: 0 + 763 = 763
-9x + x2 = 763

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 = 763 + 20.25

Reorder the terms:
20.25 + -9x + x2 = 763 + 20.25

Combine like terms: 763 + 20.25 = 783.25
20.25 + -9x + x2 = 783.25

Factor a perfect square on the left side:
(x + -4.5)(x + -4.5) = 783.25

Calculate the square root of the right side: 27.986603938

Break this problem into two subproblems by setting 
(x + -4.5) equal to 27.986603938 and -27.986603938.

Subproblem 1

x + -4.5 = 27.986603938 Simplifying x + -4.5 = 27.986603938 Reorder the terms: -4.5 + x = 27.986603938 Solving -4.5 + x = 27.986603938 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 = 27.986603938 + 4.5 Combine like terms: -4.5 + 4.5 = 0.0 0.0 + x = 27.986603938 + 4.5 x = 27.986603938 + 4.5 Combine like terms: 27.986603938 + 4.5 = 32.486603938 x = 32.486603938 Simplifying x = 32.486603938

Subproblem 2

x + -4.5 = -27.986603938 Simplifying x + -4.5 = -27.986603938 Reorder the terms: -4.5 + x = -27.986603938 Solving -4.5 + x = -27.986603938 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 = -27.986603938 + 4.5 Combine like terms: -4.5 + 4.5 = 0.0 0.0 + x = -27.986603938 + 4.5 x = -27.986603938 + 4.5 Combine like terms: -27.986603938 + 4.5 = -23.486603938 x = -23.486603938 Simplifying x = -23.486603938

Solution

The solution to the problem is based on the solutions from the subproblems. x = {32.486603938, -23.486603938}

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