0=27x-3x^2+17

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Solution for 0=27x-3x^2+17 equation:


Simplifying
0 = 27x + -3x2 + 17

Reorder the terms:
0 = 17 + 27x + -3x2

Solving
0 = 17 + 27x + -3x2

Solving for variable 'x'.

Combine like terms: 0 + -17 = -17
-17 + -27x + 3x2 = 17 + 27x + -3x2 + -17 + -27x + 3x2

Reorder the terms:
-17 + -27x + 3x2 = 17 + -17 + 27x + -27x + -3x2 + 3x2

Combine like terms: 17 + -17 = 0
-17 + -27x + 3x2 = 0 + 27x + -27x + -3x2 + 3x2
-17 + -27x + 3x2 = 27x + -27x + -3x2 + 3x2

Combine like terms: 27x + -27x = 0
-17 + -27x + 3x2 = 0 + -3x2 + 3x2
-17 + -27x + 3x2 = -3x2 + 3x2

Combine like terms: -3x2 + 3x2 = 0
-17 + -27x + 3x2 = 0

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

Divide each side by '3'.
-5.666666667 + -9x + x2 = 0

Move the constant term to the right:

Add '5.666666667' to each side of the equation.
-5.666666667 + -9x + 5.666666667 + x2 = 0 + 5.666666667

Reorder the terms:
-5.666666667 + 5.666666667 + -9x + x2 = 0 + 5.666666667

Combine like terms: -5.666666667 + 5.666666667 = 0.000000000
0.000000000 + -9x + x2 = 0 + 5.666666667
-9x + x2 = 0 + 5.666666667

Combine like terms: 0 + 5.666666667 = 5.666666667
-9x + x2 = 5.666666667

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 = 5.666666667 + 20.25

Reorder the terms:
20.25 + -9x + x2 = 5.666666667 + 20.25

Combine like terms: 5.666666667 + 20.25 = 25.916666667
20.25 + -9x + x2 = 25.916666667

Factor a perfect square on the left side:
(x + -4.5)(x + -4.5) = 25.916666667

Calculate the square root of the right side: 5.09084145

Break this problem into two subproblems by setting 
(x + -4.5) equal to 5.09084145 and -5.09084145.

Subproblem 1

x + -4.5 = 5.09084145 Simplifying x + -4.5 = 5.09084145 Reorder the terms: -4.5 + x = 5.09084145 Solving -4.5 + x = 5.09084145 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 = 5.09084145 + 4.5 Combine like terms: -4.5 + 4.5 = 0.0 0.0 + x = 5.09084145 + 4.5 x = 5.09084145 + 4.5 Combine like terms: 5.09084145 + 4.5 = 9.59084145 x = 9.59084145 Simplifying x = 9.59084145

Subproblem 2

x + -4.5 = -5.09084145 Simplifying x + -4.5 = -5.09084145 Reorder the terms: -4.5 + x = -5.09084145 Solving -4.5 + x = -5.09084145 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 = -5.09084145 + 4.5 Combine like terms: -4.5 + 4.5 = 0.0 0.0 + x = -5.09084145 + 4.5 x = -5.09084145 + 4.5 Combine like terms: -5.09084145 + 4.5 = -0.59084145 x = -0.59084145 Simplifying x = -0.59084145

Solution

The solution to the problem is based on the solutions from the subproblems. x = {9.59084145, -0.59084145}

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