0=x^2-24x-36

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Solution for 0=x^2-24x-36 equation:


Simplifying
0 = x2 + -24x + -36

Reorder the terms:
0 = -36 + -24x + x2

Solving
0 = -36 + -24x + x2

Solving for variable 'x'.

Combine like terms: 0 + 36 = 36
36 + 24x + -1x2 = -36 + -24x + x2 + 36 + 24x + -1x2

Reorder the terms:
36 + 24x + -1x2 = -36 + 36 + -24x + 24x + x2 + -1x2

Combine like terms: -36 + 36 = 0
36 + 24x + -1x2 = 0 + -24x + 24x + x2 + -1x2
36 + 24x + -1x2 = -24x + 24x + x2 + -1x2

Combine like terms: -24x + 24x = 0
36 + 24x + -1x2 = 0 + x2 + -1x2
36 + 24x + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
36 + 24x + -1x2 = 0

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

Divide each side by '-1'.
-36 + -24x + x2 = 0

Move the constant term to the right:

Add '36' to each side of the equation.
-36 + -24x + 36 + x2 = 0 + 36

Reorder the terms:
-36 + 36 + -24x + x2 = 0 + 36

Combine like terms: -36 + 36 = 0
0 + -24x + x2 = 0 + 36
-24x + x2 = 0 + 36

Combine like terms: 0 + 36 = 36
-24x + x2 = 36

The x term is -24x.  Take half its coefficient (-12).
Square it (144) and add it to both sides.

Add '144' to each side of the equation.
-24x + 144 + x2 = 36 + 144

Reorder the terms:
144 + -24x + x2 = 36 + 144

Combine like terms: 36 + 144 = 180
144 + -24x + x2 = 180

Factor a perfect square on the left side:
(x + -12)(x + -12) = 180

Calculate the square root of the right side: 13.416407865

Break this problem into two subproblems by setting 
(x + -12) equal to 13.416407865 and -13.416407865.

Subproblem 1

x + -12 = 13.416407865 Simplifying x + -12 = 13.416407865 Reorder the terms: -12 + x = 13.416407865 Solving -12 + x = 13.416407865 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '12' to each side of the equation. -12 + 12 + x = 13.416407865 + 12 Combine like terms: -12 + 12 = 0 0 + x = 13.416407865 + 12 x = 13.416407865 + 12 Combine like terms: 13.416407865 + 12 = 25.416407865 x = 25.416407865 Simplifying x = 25.416407865

Subproblem 2

x + -12 = -13.416407865 Simplifying x + -12 = -13.416407865 Reorder the terms: -12 + x = -13.416407865 Solving -12 + x = -13.416407865 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '12' to each side of the equation. -12 + 12 + x = -13.416407865 + 12 Combine like terms: -12 + 12 = 0 0 + x = -13.416407865 + 12 x = -13.416407865 + 12 Combine like terms: -13.416407865 + 12 = -1.416407865 x = -1.416407865 Simplifying x = -1.416407865

Solution

The solution to the problem is based on the solutions from the subproblems. x = {25.416407865, -1.416407865}

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