11y^2-18y+5=0

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Solution for 11y^2-18y+5=0 equation:


Simplifying
11y2 + -18y + 5 = 0

Reorder the terms:
5 + -18y + 11y2 = 0

Solving
5 + -18y + 11y2 = 0

Solving for variable 'y'.

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

Divide each side by '11'.
0.4545454545 + -1.636363636y + y2 = 0

Move the constant term to the right:

Add '-0.4545454545' to each side of the equation.
0.4545454545 + -1.636363636y + -0.4545454545 + y2 = 0 + -0.4545454545

Reorder the terms:
0.4545454545 + -0.4545454545 + -1.636363636y + y2 = 0 + -0.4545454545

Combine like terms: 0.4545454545 + -0.4545454545 = 0.0000000000
0.0000000000 + -1.636363636y + y2 = 0 + -0.4545454545
-1.636363636y + y2 = 0 + -0.4545454545

Combine like terms: 0 + -0.4545454545 = -0.4545454545
-1.636363636y + y2 = -0.4545454545

The y term is -1.636363636y.  Take half its coefficient (-0.818181818).
Square it (0.6694214873) and add it to both sides.

Add '0.6694214873' to each side of the equation.
-1.636363636y + 0.6694214873 + y2 = -0.4545454545 + 0.6694214873

Reorder the terms:
0.6694214873 + -1.636363636y + y2 = -0.4545454545 + 0.6694214873

Combine like terms: -0.4545454545 + 0.6694214873 = 0.2148760328
0.6694214873 + -1.636363636y + y2 = 0.2148760328

Factor a perfect square on the left side:
(y + -0.818181818)(y + -0.818181818) = 0.2148760328

Calculate the square root of the right side: 0.463547228

Break this problem into two subproblems by setting 
(y + -0.818181818) equal to 0.463547228 and -0.463547228.

Subproblem 1

y + -0.818181818 = 0.463547228 Simplifying y + -0.818181818 = 0.463547228 Reorder the terms: -0.818181818 + y = 0.463547228 Solving -0.818181818 + y = 0.463547228 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '0.818181818' to each side of the equation. -0.818181818 + 0.818181818 + y = 0.463547228 + 0.818181818 Combine like terms: -0.818181818 + 0.818181818 = 0.000000000 0.000000000 + y = 0.463547228 + 0.818181818 y = 0.463547228 + 0.818181818 Combine like terms: 0.463547228 + 0.818181818 = 1.281729046 y = 1.281729046 Simplifying y = 1.281729046

Subproblem 2

y + -0.818181818 = -0.463547228 Simplifying y + -0.818181818 = -0.463547228 Reorder the terms: -0.818181818 + y = -0.463547228 Solving -0.818181818 + y = -0.463547228 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '0.818181818' to each side of the equation. -0.818181818 + 0.818181818 + y = -0.463547228 + 0.818181818 Combine like terms: -0.818181818 + 0.818181818 = 0.000000000 0.000000000 + y = -0.463547228 + 0.818181818 y = -0.463547228 + 0.818181818 Combine like terms: -0.463547228 + 0.818181818 = 0.35463459 y = 0.35463459 Simplifying y = 0.35463459

Solution

The solution to the problem is based on the solutions from the subproblems. y = {1.281729046, 0.35463459}

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