2y^2+11y-2=y^2+16

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


Simplifying
2y2 + 11y + -2 = y2 + 16

Reorder the terms:
-2 + 11y + 2y2 = y2 + 16

Reorder the terms:
-2 + 11y + 2y2 = 16 + y2

Solving
-2 + 11y + 2y2 = 16 + y2

Solving for variable 'y'.

Reorder the terms:
-2 + -16 + 11y + 2y2 + -1y2 = 16 + y2 + -16 + -1y2

Combine like terms: -2 + -16 = -18
-18 + 11y + 2y2 + -1y2 = 16 + y2 + -16 + -1y2

Combine like terms: 2y2 + -1y2 = 1y2
-18 + 11y + 1y2 = 16 + y2 + -16 + -1y2

Reorder the terms:
-18 + 11y + 1y2 = 16 + -16 + y2 + -1y2

Combine like terms: 16 + -16 = 0
-18 + 11y + 1y2 = 0 + y2 + -1y2
-18 + 11y + 1y2 = y2 + -1y2

Combine like terms: y2 + -1y2 = 0
-18 + 11y + 1y2 = 0

Begin completing the square.

Move the constant term to the right:

Add '18' to each side of the equation.
-18 + 11y + 18 + y2 = 0 + 18

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

Combine like terms: -18 + 18 = 0
0 + 11y + y2 = 0 + 18
11y + y2 = 0 + 18

Combine like terms: 0 + 18 = 18
11y + y2 = 18

The y term is 11y.  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.
11y + 30.25 + y2 = 18 + 30.25

Reorder the terms:
30.25 + 11y + y2 = 18 + 30.25

Combine like terms: 18 + 30.25 = 48.25
30.25 + 11y + y2 = 48.25

Factor a perfect square on the left side:
(y + 5.5)(y + 5.5) = 48.25

Calculate the square root of the right side: 6.946221995

Break this problem into two subproblems by setting 
(y + 5.5) equal to 6.946221995 and -6.946221995.

Subproblem 1

y + 5.5 = 6.946221995 Simplifying y + 5.5 = 6.946221995 Reorder the terms: 5.5 + y = 6.946221995 Solving 5.5 + y = 6.946221995 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-5.5' to each side of the equation. 5.5 + -5.5 + y = 6.946221995 + -5.5 Combine like terms: 5.5 + -5.5 = 0.0 0.0 + y = 6.946221995 + -5.5 y = 6.946221995 + -5.5 Combine like terms: 6.946221995 + -5.5 = 1.446221995 y = 1.446221995 Simplifying y = 1.446221995

Subproblem 2

y + 5.5 = -6.946221995 Simplifying y + 5.5 = -6.946221995 Reorder the terms: 5.5 + y = -6.946221995 Solving 5.5 + y = -6.946221995 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-5.5' to each side of the equation. 5.5 + -5.5 + y = -6.946221995 + -5.5 Combine like terms: 5.5 + -5.5 = 0.0 0.0 + y = -6.946221995 + -5.5 y = -6.946221995 + -5.5 Combine like terms: -6.946221995 + -5.5 = -12.446221995 y = -12.446221995 Simplifying y = -12.446221995

Solution

The solution to the problem is based on the solutions from the subproblems. y = {1.446221995, -12.446221995}

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