x^2-13x+36=13

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Solution for x^2-13x+36=13 equation:


Simplifying
x2 + -13x + 36 = 13

Reorder the terms:
36 + -13x + x2 = 13

Solving
36 + -13x + x2 = 13

Solving for variable 'x'.

Reorder the terms:
36 + -13 + -13x + x2 = 13 + -13

Combine like terms: 36 + -13 = 23
23 + -13x + x2 = 13 + -13

Combine like terms: 13 + -13 = 0
23 + -13x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-23' to each side of the equation.
23 + -13x + -23 + x2 = 0 + -23

Reorder the terms:
23 + -23 + -13x + x2 = 0 + -23

Combine like terms: 23 + -23 = 0
0 + -13x + x2 = 0 + -23
-13x + x2 = 0 + -23

Combine like terms: 0 + -23 = -23
-13x + x2 = -23

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 = -23 + 42.25

Reorder the terms:
42.25 + -13x + x2 = -23 + 42.25

Combine like terms: -23 + 42.25 = 19.25
42.25 + -13x + x2 = 19.25

Factor a perfect square on the left side:
(x + -6.5)(x + -6.5) = 19.25

Calculate the square root of the right side: 4.387482194

Break this problem into two subproblems by setting 
(x + -6.5) equal to 4.387482194 and -4.387482194.

Subproblem 1

x + -6.5 = 4.387482194 Simplifying x + -6.5 = 4.387482194 Reorder the terms: -6.5 + x = 4.387482194 Solving -6.5 + x = 4.387482194 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 = 4.387482194 + 6.5 Combine like terms: -6.5 + 6.5 = 0.0 0.0 + x = 4.387482194 + 6.5 x = 4.387482194 + 6.5 Combine like terms: 4.387482194 + 6.5 = 10.887482194 x = 10.887482194 Simplifying x = 10.887482194

Subproblem 2

x + -6.5 = -4.387482194 Simplifying x + -6.5 = -4.387482194 Reorder the terms: -6.5 + x = -4.387482194 Solving -6.5 + x = -4.387482194 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 = -4.387482194 + 6.5 Combine like terms: -6.5 + 6.5 = 0.0 0.0 + x = -4.387482194 + 6.5 x = -4.387482194 + 6.5 Combine like terms: -4.387482194 + 6.5 = 2.112517806 x = 2.112517806 Simplifying x = 2.112517806

Solution

The solution to the problem is based on the solutions from the subproblems. x = {10.887482194, 2.112517806}

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