9x^2-54x=13

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Solution for 9x^2-54x=13 equation:


Simplifying
9x2 + -54x = 13

Reorder the terms:
-54x + 9x2 = 13

Solving
-54x + 9x2 = 13

Solving for variable 'x'.

Reorder the terms:
-13 + -54x + 9x2 = 13 + -13

Combine like terms: 13 + -13 = 0
-13 + -54x + 9x2 = 0

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

Divide each side by '9'.
-1.444444444 + -6x + x2 = 0

Move the constant term to the right:

Add '1.444444444' to each side of the equation.
-1.444444444 + -6x + 1.444444444 + x2 = 0 + 1.444444444

Reorder the terms:
-1.444444444 + 1.444444444 + -6x + x2 = 0 + 1.444444444

Combine like terms: -1.444444444 + 1.444444444 = 0.000000000
0.000000000 + -6x + x2 = 0 + 1.444444444
-6x + x2 = 0 + 1.444444444

Combine like terms: 0 + 1.444444444 = 1.444444444
-6x + x2 = 1.444444444

The x term is -6x.  Take half its coefficient (-3).
Square it (9) and add it to both sides.

Add '9' to each side of the equation.
-6x + 9 + x2 = 1.444444444 + 9

Reorder the terms:
9 + -6x + x2 = 1.444444444 + 9

Combine like terms: 1.444444444 + 9 = 10.444444444
9 + -6x + x2 = 10.444444444

Factor a perfect square on the left side:
(x + -3)(x + -3) = 10.444444444

Calculate the square root of the right side: 3.231786572

Break this problem into two subproblems by setting 
(x + -3) equal to 3.231786572 and -3.231786572.

Subproblem 1

x + -3 = 3.231786572 Simplifying x + -3 = 3.231786572 Reorder the terms: -3 + x = 3.231786572 Solving -3 + x = 3.231786572 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + x = 3.231786572 + 3 Combine like terms: -3 + 3 = 0 0 + x = 3.231786572 + 3 x = 3.231786572 + 3 Combine like terms: 3.231786572 + 3 = 6.231786572 x = 6.231786572 Simplifying x = 6.231786572

Subproblem 2

x + -3 = -3.231786572 Simplifying x + -3 = -3.231786572 Reorder the terms: -3 + x = -3.231786572 Solving -3 + x = -3.231786572 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + x = -3.231786572 + 3 Combine like terms: -3 + 3 = 0 0 + x = -3.231786572 + 3 x = -3.231786572 + 3 Combine like terms: -3.231786572 + 3 = -0.231786572 x = -0.231786572 Simplifying x = -0.231786572

Solution

The solution to the problem is based on the solutions from the subproblems. x = {6.231786572, -0.231786572}

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