x^2-56x-384=0

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Solution for x^2-56x-384=0 equation:


Simplifying
x2 + -56x + -384 = 0

Reorder the terms:
-384 + -56x + x2 = 0

Solving
-384 + -56x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '384' to each side of the equation.
-384 + -56x + 384 + x2 = 0 + 384

Reorder the terms:
-384 + 384 + -56x + x2 = 0 + 384

Combine like terms: -384 + 384 = 0
0 + -56x + x2 = 0 + 384
-56x + x2 = 0 + 384

Combine like terms: 0 + 384 = 384
-56x + x2 = 384

The x term is -56x.  Take half its coefficient (-28).
Square it (784) and add it to both sides.

Add '784' to each side of the equation.
-56x + 784 + x2 = 384 + 784

Reorder the terms:
784 + -56x + x2 = 384 + 784

Combine like terms: 384 + 784 = 1168
784 + -56x + x2 = 1168

Factor a perfect square on the left side:
(x + -28)(x + -28) = 1168

Calculate the square root of the right side: 34.176014981

Break this problem into two subproblems by setting 
(x + -28) equal to 34.176014981 and -34.176014981.

Subproblem 1

x + -28 = 34.176014981 Simplifying x + -28 = 34.176014981 Reorder the terms: -28 + x = 34.176014981 Solving -28 + x = 34.176014981 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '28' to each side of the equation. -28 + 28 + x = 34.176014981 + 28 Combine like terms: -28 + 28 = 0 0 + x = 34.176014981 + 28 x = 34.176014981 + 28 Combine like terms: 34.176014981 + 28 = 62.176014981 x = 62.176014981 Simplifying x = 62.176014981

Subproblem 2

x + -28 = -34.176014981 Simplifying x + -28 = -34.176014981 Reorder the terms: -28 + x = -34.176014981 Solving -28 + x = -34.176014981 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '28' to each side of the equation. -28 + 28 + x = -34.176014981 + 28 Combine like terms: -28 + 28 = 0 0 + x = -34.176014981 + 28 x = -34.176014981 + 28 Combine like terms: -34.176014981 + 28 = -6.176014981 x = -6.176014981 Simplifying x = -6.176014981

Solution

The solution to the problem is based on the solutions from the subproblems. x = {62.176014981, -6.176014981}

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