x^2-10x-220=0

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Solution for x^2-10x-220=0 equation:


Simplifying
x2 + -10x + -220 = 0

Reorder the terms:
-220 + -10x + x2 = 0

Solving
-220 + -10x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '220' to each side of the equation.
-220 + -10x + 220 + x2 = 0 + 220

Reorder the terms:
-220 + 220 + -10x + x2 = 0 + 220

Combine like terms: -220 + 220 = 0
0 + -10x + x2 = 0 + 220
-10x + x2 = 0 + 220

Combine like terms: 0 + 220 = 220
-10x + x2 = 220

The x term is -10x.  Take half its coefficient (-5).
Square it (25) and add it to both sides.

Add '25' to each side of the equation.
-10x + 25 + x2 = 220 + 25

Reorder the terms:
25 + -10x + x2 = 220 + 25

Combine like terms: 220 + 25 = 245
25 + -10x + x2 = 245

Factor a perfect square on the left side:
(x + -5)(x + -5) = 245

Calculate the square root of the right side: 15.652475842

Break this problem into two subproblems by setting 
(x + -5) equal to 15.652475842 and -15.652475842.

Subproblem 1

x + -5 = 15.652475842 Simplifying x + -5 = 15.652475842 Reorder the terms: -5 + x = 15.652475842 Solving -5 + x = 15.652475842 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '5' to each side of the equation. -5 + 5 + x = 15.652475842 + 5 Combine like terms: -5 + 5 = 0 0 + x = 15.652475842 + 5 x = 15.652475842 + 5 Combine like terms: 15.652475842 + 5 = 20.652475842 x = 20.652475842 Simplifying x = 20.652475842

Subproblem 2

x + -5 = -15.652475842 Simplifying x + -5 = -15.652475842 Reorder the terms: -5 + x = -15.652475842 Solving -5 + x = -15.652475842 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '5' to each side of the equation. -5 + 5 + x = -15.652475842 + 5 Combine like terms: -5 + 5 = 0 0 + x = -15.652475842 + 5 x = -15.652475842 + 5 Combine like terms: -15.652475842 + 5 = -10.652475842 x = -10.652475842 Simplifying x = -10.652475842

Solution

The solution to the problem is based on the solutions from the subproblems. x = {20.652475842, -10.652475842}

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