x^2-12x+11=220

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Solution for x^2-12x+11=220 equation:


Simplifying
x2 + -12x + 11 = 220

Reorder the terms:
11 + -12x + x2 = 220

Solving
11 + -12x + x2 = 220

Solving for variable 'x'.

Reorder the terms:
11 + -220 + -12x + x2 = 220 + -220

Combine like terms: 11 + -220 = -209
-209 + -12x + x2 = 220 + -220

Combine like terms: 220 + -220 = 0
-209 + -12x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '209' to each side of the equation.
-209 + -12x + 209 + x2 = 0 + 209

Reorder the terms:
-209 + 209 + -12x + x2 = 0 + 209

Combine like terms: -209 + 209 = 0
0 + -12x + x2 = 0 + 209
-12x + x2 = 0 + 209

Combine like terms: 0 + 209 = 209
-12x + x2 = 209

The x term is -12x.  Take half its coefficient (-6).
Square it (36) and add it to both sides.

Add '36' to each side of the equation.
-12x + 36 + x2 = 209 + 36

Reorder the terms:
36 + -12x + x2 = 209 + 36

Combine like terms: 209 + 36 = 245
36 + -12x + x2 = 245

Factor a perfect square on the left side:
(x + -6)(x + -6) = 245

Calculate the square root of the right side: 15.652475842

Break this problem into two subproblems by setting 
(x + -6) equal to 15.652475842 and -15.652475842.

Subproblem 1

x + -6 = 15.652475842 Simplifying x + -6 = 15.652475842 Reorder the terms: -6 + x = 15.652475842 Solving -6 + x = 15.652475842 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '6' to each side of the equation. -6 + 6 + x = 15.652475842 + 6 Combine like terms: -6 + 6 = 0 0 + x = 15.652475842 + 6 x = 15.652475842 + 6 Combine like terms: 15.652475842 + 6 = 21.652475842 x = 21.652475842 Simplifying x = 21.652475842

Subproblem 2

x + -6 = -15.652475842 Simplifying x + -6 = -15.652475842 Reorder the terms: -6 + x = -15.652475842 Solving -6 + x = -15.652475842 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '6' to each side of the equation. -6 + 6 + x = -15.652475842 + 6 Combine like terms: -6 + 6 = 0 0 + x = -15.652475842 + 6 x = -15.652475842 + 6 Combine like terms: -15.652475842 + 6 = -9.652475842 x = -9.652475842 Simplifying x = -9.652475842

Solution

The solution to the problem is based on the solutions from the subproblems. x = {21.652475842, -9.652475842}

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