X^2-11X+5=0

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Solution for X^2-11X+5=0 equation:


Simplifying
X2 + -11X + 5 = 0

Reorder the terms:
5 + -11X + X2 = 0

Solving
5 + -11X + X2 = 0

Solving for variable 'X'.

Begin completing the square.

Move the constant term to the right:

Add '-5' to each side of the equation.
5 + -11X + -5 + X2 = 0 + -5

Reorder the terms:
5 + -5 + -11X + X2 = 0 + -5

Combine like terms: 5 + -5 = 0
0 + -11X + X2 = 0 + -5
-11X + X2 = 0 + -5

Combine like terms: 0 + -5 = -5
-11X + X2 = -5

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 = -5 + 30.25

Reorder the terms:
30.25 + -11X + X2 = -5 + 30.25

Combine like terms: -5 + 30.25 = 25.25
30.25 + -11X + X2 = 25.25

Factor a perfect square on the left side:
(X + -5.5)(X + -5.5) = 25.25

Calculate the square root of the right side: 5.024937811

Break this problem into two subproblems by setting 
(X + -5.5) equal to 5.024937811 and -5.024937811.

Subproblem 1

X + -5.5 = 5.024937811 Simplifying X + -5.5 = 5.024937811 Reorder the terms: -5.5 + X = 5.024937811 Solving -5.5 + X = 5.024937811 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '5.5' to each side of the equation. -5.5 + 5.5 + X = 5.024937811 + 5.5 Combine like terms: -5.5 + 5.5 = 0.0 0.0 + X = 5.024937811 + 5.5 X = 5.024937811 + 5.5 Combine like terms: 5.024937811 + 5.5 = 10.524937811 X = 10.524937811 Simplifying X = 10.524937811

Subproblem 2

X + -5.5 = -5.024937811 Simplifying X + -5.5 = -5.024937811 Reorder the terms: -5.5 + X = -5.024937811 Solving -5.5 + X = -5.024937811 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '5.5' to each side of the equation. -5.5 + 5.5 + X = -5.024937811 + 5.5 Combine like terms: -5.5 + 5.5 = 0.0 0.0 + X = -5.024937811 + 5.5 X = -5.024937811 + 5.5 Combine like terms: -5.024937811 + 5.5 = 0.475062189 X = 0.475062189 Simplifying X = 0.475062189

Solution

The solution to the problem is based on the solutions from the subproblems. X = {10.524937811, 0.475062189}

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