x^2-64x-320=0

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Solution for x^2-64x-320=0 equation:


Simplifying
x2 + -64x + -320 = 0

Reorder the terms:
-320 + -64x + x2 = 0

Solving
-320 + -64x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '320' to each side of the equation.
-320 + -64x + 320 + x2 = 0 + 320

Reorder the terms:
-320 + 320 + -64x + x2 = 0 + 320

Combine like terms: -320 + 320 = 0
0 + -64x + x2 = 0 + 320
-64x + x2 = 0 + 320

Combine like terms: 0 + 320 = 320
-64x + x2 = 320

The x term is -64x.  Take half its coefficient (-32).
Square it (1024) and add it to both sides.

Add '1024' to each side of the equation.
-64x + 1024 + x2 = 320 + 1024

Reorder the terms:
1024 + -64x + x2 = 320 + 1024

Combine like terms: 320 + 1024 = 1344
1024 + -64x + x2 = 1344

Factor a perfect square on the left side:
(x + -32)(x + -32) = 1344

Calculate the square root of the right side: 36.66060556

Break this problem into two subproblems by setting 
(x + -32) equal to 36.66060556 and -36.66060556.

Subproblem 1

x + -32 = 36.66060556 Simplifying x + -32 = 36.66060556 Reorder the terms: -32 + x = 36.66060556 Solving -32 + x = 36.66060556 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '32' to each side of the equation. -32 + 32 + x = 36.66060556 + 32 Combine like terms: -32 + 32 = 0 0 + x = 36.66060556 + 32 x = 36.66060556 + 32 Combine like terms: 36.66060556 + 32 = 68.66060556 x = 68.66060556 Simplifying x = 68.66060556

Subproblem 2

x + -32 = -36.66060556 Simplifying x + -32 = -36.66060556 Reorder the terms: -32 + x = -36.66060556 Solving -32 + x = -36.66060556 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '32' to each side of the equation. -32 + 32 + x = -36.66060556 + 32 Combine like terms: -32 + 32 = 0 0 + x = -36.66060556 + 32 x = -36.66060556 + 32 Combine like terms: -36.66060556 + 32 = -4.66060556 x = -4.66060556 Simplifying x = -4.66060556

Solution

The solution to the problem is based on the solutions from the subproblems. x = {68.66060556, -4.66060556}

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