x^2-13x=-33

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Solution for x^2-13x=-33 equation:


Simplifying
x2 + -13x = -33

Reorder the terms:
-13x + x2 = -33

Solving
-13x + x2 = -33

Solving for variable 'x'.

Reorder the terms:
33 + -13x + x2 = -33 + 33

Combine like terms: -33 + 33 = 0
33 + -13x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-33' to each side of the equation.
33 + -13x + -33 + x2 = 0 + -33

Reorder the terms:
33 + -33 + -13x + x2 = 0 + -33

Combine like terms: 33 + -33 = 0
0 + -13x + x2 = 0 + -33
-13x + x2 = 0 + -33

Combine like terms: 0 + -33 = -33
-13x + x2 = -33

The x term is -13x.  Take half its coefficient (-6.5).
Square it (42.25) and add it to both sides.

Add '42.25' to each side of the equation.
-13x + 42.25 + x2 = -33 + 42.25

Reorder the terms:
42.25 + -13x + x2 = -33 + 42.25

Combine like terms: -33 + 42.25 = 9.25
42.25 + -13x + x2 = 9.25

Factor a perfect square on the left side:
(x + -6.5)(x + -6.5) = 9.25

Calculate the square root of the right side: 3.041381265

Break this problem into two subproblems by setting 
(x + -6.5) equal to 3.041381265 and -3.041381265.

Subproblem 1

x + -6.5 = 3.041381265 Simplifying x + -6.5 = 3.041381265 Reorder the terms: -6.5 + x = 3.041381265 Solving -6.5 + x = 3.041381265 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '6.5' to each side of the equation. -6.5 + 6.5 + x = 3.041381265 + 6.5 Combine like terms: -6.5 + 6.5 = 0.0 0.0 + x = 3.041381265 + 6.5 x = 3.041381265 + 6.5 Combine like terms: 3.041381265 + 6.5 = 9.541381265 x = 9.541381265 Simplifying x = 9.541381265

Subproblem 2

x + -6.5 = -3.041381265 Simplifying x + -6.5 = -3.041381265 Reorder the terms: -6.5 + x = -3.041381265 Solving -6.5 + x = -3.041381265 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '6.5' to each side of the equation. -6.5 + 6.5 + x = -3.041381265 + 6.5 Combine like terms: -6.5 + 6.5 = 0.0 0.0 + x = -3.041381265 + 6.5 x = -3.041381265 + 6.5 Combine like terms: -3.041381265 + 6.5 = 3.458618735 x = 3.458618735 Simplifying x = 3.458618735

Solution

The solution to the problem is based on the solutions from the subproblems. x = {9.541381265, 3.458618735}

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