X^2+24X-72=0

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Solution for X^2+24X-72=0 equation:


Simplifying
X2 + 24X + -72 = 0

Reorder the terms:
-72 + 24X + X2 = 0

Solving
-72 + 24X + X2 = 0

Solving for variable 'X'.

Begin completing the square.

Move the constant term to the right:

Add '72' to each side of the equation.
-72 + 24X + 72 + X2 = 0 + 72

Reorder the terms:
-72 + 72 + 24X + X2 = 0 + 72

Combine like terms: -72 + 72 = 0
0 + 24X + X2 = 0 + 72
24X + X2 = 0 + 72

Combine like terms: 0 + 72 = 72
24X + X2 = 72

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 = 72 + 144

Reorder the terms:
144 + 24X + X2 = 72 + 144

Combine like terms: 72 + 144 = 216
144 + 24X + X2 = 216

Factor a perfect square on the left side:
(X + 12)(X + 12) = 216

Calculate the square root of the right side: 14.696938457

Break this problem into two subproblems by setting 
(X + 12) equal to 14.696938457 and -14.696938457.

Subproblem 1

X + 12 = 14.696938457 Simplifying X + 12 = 14.696938457 Reorder the terms: 12 + X = 14.696938457 Solving 12 + X = 14.696938457 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 = 14.696938457 + -12 Combine like terms: 12 + -12 = 0 0 + X = 14.696938457 + -12 X = 14.696938457 + -12 Combine like terms: 14.696938457 + -12 = 2.696938457 X = 2.696938457 Simplifying X = 2.696938457

Subproblem 2

X + 12 = -14.696938457 Simplifying X + 12 = -14.696938457 Reorder the terms: 12 + X = -14.696938457 Solving 12 + X = -14.696938457 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 = -14.696938457 + -12 Combine like terms: 12 + -12 = 0 0 + X = -14.696938457 + -12 X = -14.696938457 + -12 Combine like terms: -14.696938457 + -12 = -26.696938457 X = -26.696938457 Simplifying X = -26.696938457

Solution

The solution to the problem is based on the solutions from the subproblems. X = {2.696938457, -26.696938457}

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