4y+8+5y=y^2+3

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Solution for 4y+8+5y=y^2+3 equation:


Simplifying
4y + 8 + 5y = y2 + 3

Reorder the terms:
8 + 4y + 5y = y2 + 3

Combine like terms: 4y + 5y = 9y
8 + 9y = y2 + 3

Reorder the terms:
8 + 9y = 3 + y2

Solving
8 + 9y = 3 + y2

Solving for variable 'y'.

Reorder the terms:
8 + -3 + 9y + -1y2 = 3 + y2 + -3 + -1y2

Combine like terms: 8 + -3 = 5
5 + 9y + -1y2 = 3 + y2 + -3 + -1y2

Reorder the terms:
5 + 9y + -1y2 = 3 + -3 + y2 + -1y2

Combine like terms: 3 + -3 = 0
5 + 9y + -1y2 = 0 + y2 + -1y2
5 + 9y + -1y2 = y2 + -1y2

Combine like terms: y2 + -1y2 = 0
5 + 9y + -1y2 = 0

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
-5 + -9y + y2 = 0

Move the constant term to the right:

Add '5' to each side of the equation.
-5 + -9y + 5 + y2 = 0 + 5

Reorder the terms:
-5 + 5 + -9y + y2 = 0 + 5

Combine like terms: -5 + 5 = 0
0 + -9y + y2 = 0 + 5
-9y + y2 = 0 + 5

Combine like terms: 0 + 5 = 5
-9y + y2 = 5

The y term is -9y.  Take half its coefficient (-4.5).
Square it (20.25) and add it to both sides.

Add '20.25' to each side of the equation.
-9y + 20.25 + y2 = 5 + 20.25

Reorder the terms:
20.25 + -9y + y2 = 5 + 20.25

Combine like terms: 5 + 20.25 = 25.25
20.25 + -9y + y2 = 25.25

Factor a perfect square on the left side:
(y + -4.5)(y + -4.5) = 25.25

Calculate the square root of the right side: 5.024937811

Break this problem into two subproblems by setting 
(y + -4.5) equal to 5.024937811 and -5.024937811.

Subproblem 1

y + -4.5 = 5.024937811 Simplifying y + -4.5 = 5.024937811 Reorder the terms: -4.5 + y = 5.024937811 Solving -4.5 + y = 5.024937811 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '4.5' to each side of the equation. -4.5 + 4.5 + y = 5.024937811 + 4.5 Combine like terms: -4.5 + 4.5 = 0.0 0.0 + y = 5.024937811 + 4.5 y = 5.024937811 + 4.5 Combine like terms: 5.024937811 + 4.5 = 9.524937811 y = 9.524937811 Simplifying y = 9.524937811

Subproblem 2

y + -4.5 = -5.024937811 Simplifying y + -4.5 = -5.024937811 Reorder the terms: -4.5 + y = -5.024937811 Solving -4.5 + y = -5.024937811 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '4.5' to each side of the equation. -4.5 + 4.5 + y = -5.024937811 + 4.5 Combine like terms: -4.5 + 4.5 = 0.0 0.0 + y = -5.024937811 + 4.5 y = -5.024937811 + 4.5 Combine like terms: -5.024937811 + 4.5 = -0.524937811 y = -0.524937811 Simplifying y = -0.524937811

Solution

The solution to the problem is based on the solutions from the subproblems. y = {9.524937811, -0.524937811}

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