11y^2+16y-20=0

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Solution for 11y^2+16y-20=0 equation:


Simplifying
11y2 + 16y + -20 = 0

Reorder the terms:
-20 + 16y + 11y2 = 0

Solving
-20 + 16y + 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'.
-1.818181818 + 1.454545455y + y2 = 0

Move the constant term to the right:

Add '1.818181818' to each side of the equation.
-1.818181818 + 1.454545455y + 1.818181818 + y2 = 0 + 1.818181818

Reorder the terms:
-1.818181818 + 1.818181818 + 1.454545455y + y2 = 0 + 1.818181818

Combine like terms: -1.818181818 + 1.818181818 = 0.000000000
0.000000000 + 1.454545455y + y2 = 0 + 1.818181818
1.454545455y + y2 = 0 + 1.818181818

Combine like terms: 0 + 1.818181818 = 1.818181818
1.454545455y + y2 = 1.818181818

The y term is 1.454545455y.  Take half its coefficient (0.7272727275).
Square it (0.5289256202) and add it to both sides.

Add '0.5289256202' to each side of the equation.
1.454545455y + 0.5289256202 + y2 = 1.818181818 + 0.5289256202

Reorder the terms:
0.5289256202 + 1.454545455y + y2 = 1.818181818 + 0.5289256202

Combine like terms: 1.818181818 + 0.5289256202 = 2.3471074382
0.5289256202 + 1.454545455y + y2 = 2.3471074382

Factor a perfect square on the left side:
(y + 0.7272727275)(y + 0.7272727275) = 2.3471074382

Calculate the square root of the right side: 1.532027232

Break this problem into two subproblems by setting 
(y + 0.7272727275) equal to 1.532027232 and -1.532027232.

Subproblem 1

y + 0.7272727275 = 1.532027232 Simplifying y + 0.7272727275 = 1.532027232 Reorder the terms: 0.7272727275 + y = 1.532027232 Solving 0.7272727275 + y = 1.532027232 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-0.7272727275' to each side of the equation. 0.7272727275 + -0.7272727275 + y = 1.532027232 + -0.7272727275 Combine like terms: 0.7272727275 + -0.7272727275 = 0.0000000000 0.0000000000 + y = 1.532027232 + -0.7272727275 y = 1.532027232 + -0.7272727275 Combine like terms: 1.532027232 + -0.7272727275 = 0.8047545045 y = 0.8047545045 Simplifying y = 0.8047545045

Subproblem 2

y + 0.7272727275 = -1.532027232 Simplifying y + 0.7272727275 = -1.532027232 Reorder the terms: 0.7272727275 + y = -1.532027232 Solving 0.7272727275 + y = -1.532027232 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-0.7272727275' to each side of the equation. 0.7272727275 + -0.7272727275 + y = -1.532027232 + -0.7272727275 Combine like terms: 0.7272727275 + -0.7272727275 = 0.0000000000 0.0000000000 + y = -1.532027232 + -0.7272727275 y = -1.532027232 + -0.7272727275 Combine like terms: -1.532027232 + -0.7272727275 = -2.2592999595 y = -2.2592999595 Simplifying y = -2.2592999595

Solution

The solution to the problem is based on the solutions from the subproblems. y = {0.8047545045, -2.2592999595}

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