-x^2+9x-3=0

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Solution for -x^2+9x-3=0 equation:


Simplifying
-1x2 + 9x + -3 = 0

Reorder the terms:
-3 + 9x + -1x2 = 0

Solving
-3 + 9x + -1x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
3 + -9x + x2 = 0

Move the constant term to the right:

Add '-3' to each side of the equation.
3 + -9x + -3 + x2 = 0 + -3

Reorder the terms:
3 + -3 + -9x + x2 = 0 + -3

Combine like terms: 3 + -3 = 0
0 + -9x + x2 = 0 + -3
-9x + x2 = 0 + -3

Combine like terms: 0 + -3 = -3
-9x + x2 = -3

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 = -3 + 20.25

Reorder the terms:
20.25 + -9x + x2 = -3 + 20.25

Combine like terms: -3 + 20.25 = 17.25
20.25 + -9x + x2 = 17.25

Factor a perfect square on the left side:
(x + -4.5)(x + -4.5) = 17.25

Calculate the square root of the right side: 4.153311931

Break this problem into two subproblems by setting 
(x + -4.5) equal to 4.153311931 and -4.153311931.

Subproblem 1

x + -4.5 = 4.153311931 Simplifying x + -4.5 = 4.153311931 Reorder the terms: -4.5 + x = 4.153311931 Solving -4.5 + x = 4.153311931 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 = 4.153311931 + 4.5 Combine like terms: -4.5 + 4.5 = 0.0 0.0 + x = 4.153311931 + 4.5 x = 4.153311931 + 4.5 Combine like terms: 4.153311931 + 4.5 = 8.653311931 x = 8.653311931 Simplifying x = 8.653311931

Subproblem 2

x + -4.5 = -4.153311931 Simplifying x + -4.5 = -4.153311931 Reorder the terms: -4.5 + x = -4.153311931 Solving -4.5 + x = -4.153311931 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 = -4.153311931 + 4.5 Combine like terms: -4.5 + 4.5 = 0.0 0.0 + x = -4.153311931 + 4.5 x = -4.153311931 + 4.5 Combine like terms: -4.153311931 + 4.5 = 0.346688069 x = 0.346688069 Simplifying x = 0.346688069

Solution

The solution to the problem is based on the solutions from the subproblems. x = {8.653311931, 0.346688069}

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