11x^2-20x+8=0

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Solution for 11x^2-20x+8=0 equation:


Simplifying
11x2 + -20x + 8 = 0

Reorder the terms:
8 + -20x + 11x2 = 0

Solving
8 + -20x + 11x2 = 0

Solving for variable 'x'.

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

Divide each side by '11'.
0.7272727273 + -1.818181818x + x2 = 0

Move the constant term to the right:

Add '-0.7272727273' to each side of the equation.
0.7272727273 + -1.818181818x + -0.7272727273 + x2 = 0 + -0.7272727273

Reorder the terms:
0.7272727273 + -0.7272727273 + -1.818181818x + x2 = 0 + -0.7272727273

Combine like terms: 0.7272727273 + -0.7272727273 = 0.0000000000
0.0000000000 + -1.818181818x + x2 = 0 + -0.7272727273
-1.818181818x + x2 = 0 + -0.7272727273

Combine like terms: 0 + -0.7272727273 = -0.7272727273
-1.818181818x + x2 = -0.7272727273

The x term is -1.818181818x.  Take half its coefficient (-0.909090909).
Square it (0.8264462808) and add it to both sides.

Add '0.8264462808' to each side of the equation.
-1.818181818x + 0.8264462808 + x2 = -0.7272727273 + 0.8264462808

Reorder the terms:
0.8264462808 + -1.818181818x + x2 = -0.7272727273 + 0.8264462808

Combine like terms: -0.7272727273 + 0.8264462808 = 0.0991735535
0.8264462808 + -1.818181818x + x2 = 0.0991735535

Factor a perfect square on the left side:
(x + -0.909090909)(x + -0.909090909) = 0.0991735535

Calculate the square root of the right side: 0.314918328

Break this problem into two subproblems by setting 
(x + -0.909090909) equal to 0.314918328 and -0.314918328.

Subproblem 1

x + -0.909090909 = 0.314918328 Simplifying x + -0.909090909 = 0.314918328 Reorder the terms: -0.909090909 + x = 0.314918328 Solving -0.909090909 + x = 0.314918328 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.909090909' to each side of the equation. -0.909090909 + 0.909090909 + x = 0.314918328 + 0.909090909 Combine like terms: -0.909090909 + 0.909090909 = 0.000000000 0.000000000 + x = 0.314918328 + 0.909090909 x = 0.314918328 + 0.909090909 Combine like terms: 0.314918328 + 0.909090909 = 1.224009237 x = 1.224009237 Simplifying x = 1.224009237

Subproblem 2

x + -0.909090909 = -0.314918328 Simplifying x + -0.909090909 = -0.314918328 Reorder the terms: -0.909090909 + x = -0.314918328 Solving -0.909090909 + x = -0.314918328 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.909090909' to each side of the equation. -0.909090909 + 0.909090909 + x = -0.314918328 + 0.909090909 Combine like terms: -0.909090909 + 0.909090909 = 0.000000000 0.000000000 + x = -0.314918328 + 0.909090909 x = -0.314918328 + 0.909090909 Combine like terms: -0.314918328 + 0.909090909 = 0.594172581 x = 0.594172581 Simplifying x = 0.594172581

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.224009237, 0.594172581}

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