x(11-x)=121

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Solution for x(11-x)=121 equation:


Simplifying
x(11 + -1x) = 121
(11 * x + -1x * x) = 121
(11x + -1x2) = 121

Solving
11x + -1x2 = 121

Solving for variable 'x'.

Reorder the terms:
-121 + 11x + -1x2 = 121 + -121

Combine like terms: 121 + -121 = 0
-121 + 11x + -1x2 = 0

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
121 + -11x + x2 = 0

Move the constant term to the right:

Add '-121' to each side of the equation.
121 + -11x + -121 + x2 = 0 + -121

Reorder the terms:
121 + -121 + -11x + x2 = 0 + -121

Combine like terms: 121 + -121 = 0
0 + -11x + x2 = 0 + -121
-11x + x2 = 0 + -121

Combine like terms: 0 + -121 = -121
-11x + x2 = -121

The x term is -11x.  Take half its coefficient (-5.5).
Square it (30.25) and add it to both sides.

Add '30.25' to each side of the equation.
-11x + 30.25 + x2 = -121 + 30.25

Reorder the terms:
30.25 + -11x + x2 = -121 + 30.25

Combine like terms: -121 + 30.25 = -90.75
30.25 + -11x + x2 = -90.75

Factor a perfect square on the left side:
(x + -5.5)(x + -5.5) = -90.75

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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