x^2-28x-160=0

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Solution for x^2-28x-160=0 equation:


Simplifying
x2 + -28x + -160 = 0

Reorder the terms:
-160 + -28x + x2 = 0

Solving
-160 + -28x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '160' to each side of the equation.
-160 + -28x + 160 + x2 = 0 + 160

Reorder the terms:
-160 + 160 + -28x + x2 = 0 + 160

Combine like terms: -160 + 160 = 0
0 + -28x + x2 = 0 + 160
-28x + x2 = 0 + 160

Combine like terms: 0 + 160 = 160
-28x + x2 = 160

The x term is -28x.  Take half its coefficient (-14).
Square it (196) and add it to both sides.

Add '196' to each side of the equation.
-28x + 196 + x2 = 160 + 196

Reorder the terms:
196 + -28x + x2 = 160 + 196

Combine like terms: 160 + 196 = 356
196 + -28x + x2 = 356

Factor a perfect square on the left side:
(x + -14)(x + -14) = 356

Calculate the square root of the right side: 18.867962264

Break this problem into two subproblems by setting 
(x + -14) equal to 18.867962264 and -18.867962264.

Subproblem 1

x + -14 = 18.867962264 Simplifying x + -14 = 18.867962264 Reorder the terms: -14 + x = 18.867962264 Solving -14 + x = 18.867962264 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '14' to each side of the equation. -14 + 14 + x = 18.867962264 + 14 Combine like terms: -14 + 14 = 0 0 + x = 18.867962264 + 14 x = 18.867962264 + 14 Combine like terms: 18.867962264 + 14 = 32.867962264 x = 32.867962264 Simplifying x = 32.867962264

Subproblem 2

x + -14 = -18.867962264 Simplifying x + -14 = -18.867962264 Reorder the terms: -14 + x = -18.867962264 Solving -14 + x = -18.867962264 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '14' to each side of the equation. -14 + 14 + x = -18.867962264 + 14 Combine like terms: -14 + 14 = 0 0 + x = -18.867962264 + 14 x = -18.867962264 + 14 Combine like terms: -18.867962264 + 14 = -4.867962264 x = -4.867962264 Simplifying x = -4.867962264

Solution

The solution to the problem is based on the solutions from the subproblems. x = {32.867962264, -4.867962264}

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