y^2+11y+45=23

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Solution for y^2+11y+45=23 equation:


Simplifying
y2 + 11y + 45 = 23

Reorder the terms:
45 + 11y + y2 = 23

Solving
45 + 11y + y2 = 23

Solving for variable 'y'.

Reorder the terms:
45 + -23 + 11y + y2 = 23 + -23

Combine like terms: 45 + -23 = 22
22 + 11y + y2 = 23 + -23

Combine like terms: 23 + -23 = 0
22 + 11y + y2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-22' to each side of the equation.
22 + 11y + -22 + y2 = 0 + -22

Reorder the terms:
22 + -22 + 11y + y2 = 0 + -22

Combine like terms: 22 + -22 = 0
0 + 11y + y2 = 0 + -22
11y + y2 = 0 + -22

Combine like terms: 0 + -22 = -22
11y + y2 = -22

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 = -22 + 30.25

Reorder the terms:
30.25 + 11y + y2 = -22 + 30.25

Combine like terms: -22 + 30.25 = 8.25
30.25 + 11y + y2 = 8.25

Factor a perfect square on the left side:
(y + 5.5)(y + 5.5) = 8.25

Calculate the square root of the right side: 2.872281323

Break this problem into two subproblems by setting 
(y + 5.5) equal to 2.872281323 and -2.872281323.

Subproblem 1

y + 5.5 = 2.872281323 Simplifying y + 5.5 = 2.872281323 Reorder the terms: 5.5 + y = 2.872281323 Solving 5.5 + y = 2.872281323 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 = 2.872281323 + -5.5 Combine like terms: 5.5 + -5.5 = 0.0 0.0 + y = 2.872281323 + -5.5 y = 2.872281323 + -5.5 Combine like terms: 2.872281323 + -5.5 = -2.627718677 y = -2.627718677 Simplifying y = -2.627718677

Subproblem 2

y + 5.5 = -2.872281323 Simplifying y + 5.5 = -2.872281323 Reorder the terms: 5.5 + y = -2.872281323 Solving 5.5 + y = -2.872281323 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 = -2.872281323 + -5.5 Combine like terms: 5.5 + -5.5 = 0.0 0.0 + y = -2.872281323 + -5.5 y = -2.872281323 + -5.5 Combine like terms: -2.872281323 + -5.5 = -8.372281323 y = -8.372281323 Simplifying y = -8.372281323

Solution

The solution to the problem is based on the solutions from the subproblems. y = {-2.627718677, -8.372281323}

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