y^2-22y-4=0

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Solution for y^2-22y-4=0 equation:


Simplifying
y2 + -22y + -4 = 0

Reorder the terms:
-4 + -22y + y2 = 0

Solving
-4 + -22y + y2 = 0

Solving for variable 'y'.

Begin completing the square.

Move the constant term to the right:

Add '4' to each side of the equation.
-4 + -22y + 4 + y2 = 0 + 4

Reorder the terms:
-4 + 4 + -22y + y2 = 0 + 4

Combine like terms: -4 + 4 = 0
0 + -22y + y2 = 0 + 4
-22y + y2 = 0 + 4

Combine like terms: 0 + 4 = 4
-22y + y2 = 4

The y term is -22y.  Take half its coefficient (-11).
Square it (121) and add it to both sides.

Add '121' to each side of the equation.
-22y + 121 + y2 = 4 + 121

Reorder the terms:
121 + -22y + y2 = 4 + 121

Combine like terms: 4 + 121 = 125
121 + -22y + y2 = 125

Factor a perfect square on the left side:
(y + -11)(y + -11) = 125

Calculate the square root of the right side: 11.180339887

Break this problem into two subproblems by setting 
(y + -11) equal to 11.180339887 and -11.180339887.

Subproblem 1

y + -11 = 11.180339887 Simplifying y + -11 = 11.180339887 Reorder the terms: -11 + y = 11.180339887 Solving -11 + y = 11.180339887 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '11' to each side of the equation. -11 + 11 + y = 11.180339887 + 11 Combine like terms: -11 + 11 = 0 0 + y = 11.180339887 + 11 y = 11.180339887 + 11 Combine like terms: 11.180339887 + 11 = 22.180339887 y = 22.180339887 Simplifying y = 22.180339887

Subproblem 2

y + -11 = -11.180339887 Simplifying y + -11 = -11.180339887 Reorder the terms: -11 + y = -11.180339887 Solving -11 + y = -11.180339887 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '11' to each side of the equation. -11 + 11 + y = -11.180339887 + 11 Combine like terms: -11 + 11 = 0 0 + y = -11.180339887 + 11 y = -11.180339887 + 11 Combine like terms: -11.180339887 + 11 = -0.180339887 y = -0.180339887 Simplifying y = -0.180339887

Solution

The solution to the problem is based on the solutions from the subproblems. y = {22.180339887, -0.180339887}

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