x^2-24x-15=0

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Solution for x^2-24x-15=0 equation:


Simplifying
x2 + -24x + -15 = 0

Reorder the terms:
-15 + -24x + x2 = 0

Solving
-15 + -24x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '15' to each side of the equation.
-15 + -24x + 15 + x2 = 0 + 15

Reorder the terms:
-15 + 15 + -24x + x2 = 0 + 15

Combine like terms: -15 + 15 = 0
0 + -24x + x2 = 0 + 15
-24x + x2 = 0 + 15

Combine like terms: 0 + 15 = 15
-24x + x2 = 15

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 = 15 + 144

Reorder the terms:
144 + -24x + x2 = 15 + 144

Combine like terms: 15 + 144 = 159
144 + -24x + x2 = 159

Factor a perfect square on the left side:
(x + -12)(x + -12) = 159

Calculate the square root of the right side: 12.609520213

Break this problem into two subproblems by setting 
(x + -12) equal to 12.609520213 and -12.609520213.

Subproblem 1

x + -12 = 12.609520213 Simplifying x + -12 = 12.609520213 Reorder the terms: -12 + x = 12.609520213 Solving -12 + x = 12.609520213 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 = 12.609520213 + 12 Combine like terms: -12 + 12 = 0 0 + x = 12.609520213 + 12 x = 12.609520213 + 12 Combine like terms: 12.609520213 + 12 = 24.609520213 x = 24.609520213 Simplifying x = 24.609520213

Subproblem 2

x + -12 = -12.609520213 Simplifying x + -12 = -12.609520213 Reorder the terms: -12 + x = -12.609520213 Solving -12 + x = -12.609520213 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 = -12.609520213 + 12 Combine like terms: -12 + 12 = 0 0 + x = -12.609520213 + 12 x = -12.609520213 + 12 Combine like terms: -12.609520213 + 12 = -0.609520213 x = -0.609520213 Simplifying x = -0.609520213

Solution

The solution to the problem is based on the solutions from the subproblems. x = {24.609520213, -0.609520213}

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