y(2y-5)=3y+1

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Solution for y(2y-5)=3y+1 equation:


Simplifying
y(2y + -5) = 3y + 1

Reorder the terms:
y(-5 + 2y) = 3y + 1
(-5 * y + 2y * y) = 3y + 1
(-5y + 2y2) = 3y + 1

Reorder the terms:
-5y + 2y2 = 1 + 3y

Solving
-5y + 2y2 = 1 + 3y

Solving for variable 'y'.

Reorder the terms:
-1 + -5y + -3y + 2y2 = 1 + 3y + -1 + -3y

Combine like terms: -5y + -3y = -8y
-1 + -8y + 2y2 = 1 + 3y + -1 + -3y

Reorder the terms:
-1 + -8y + 2y2 = 1 + -1 + 3y + -3y

Combine like terms: 1 + -1 = 0
-1 + -8y + 2y2 = 0 + 3y + -3y
-1 + -8y + 2y2 = 3y + -3y

Combine like terms: 3y + -3y = 0
-1 + -8y + 2y2 = 0

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

Divide each side by '2'.
-0.5 + -4y + y2 = 0

Move the constant term to the right:

Add '0.5' to each side of the equation.
-0.5 + -4y + 0.5 + y2 = 0 + 0.5

Reorder the terms:
-0.5 + 0.5 + -4y + y2 = 0 + 0.5

Combine like terms: -0.5 + 0.5 = 0.0
0.0 + -4y + y2 = 0 + 0.5
-4y + y2 = 0 + 0.5

Combine like terms: 0 + 0.5 = 0.5
-4y + y2 = 0.5

The y term is -4y.  Take half its coefficient (-2).
Square it (4) and add it to both sides.

Add '4' to each side of the equation.
-4y + 4 + y2 = 0.5 + 4

Reorder the terms:
4 + -4y + y2 = 0.5 + 4

Combine like terms: 0.5 + 4 = 4.5
4 + -4y + y2 = 4.5

Factor a perfect square on the left side:
(y + -2)(y + -2) = 4.5

Calculate the square root of the right side: 2.121320344

Break this problem into two subproblems by setting 
(y + -2) equal to 2.121320344 and -2.121320344.

Subproblem 1

y + -2 = 2.121320344 Simplifying y + -2 = 2.121320344 Reorder the terms: -2 + y = 2.121320344 Solving -2 + y = 2.121320344 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + y = 2.121320344 + 2 Combine like terms: -2 + 2 = 0 0 + y = 2.121320344 + 2 y = 2.121320344 + 2 Combine like terms: 2.121320344 + 2 = 4.121320344 y = 4.121320344 Simplifying y = 4.121320344

Subproblem 2

y + -2 = -2.121320344 Simplifying y + -2 = -2.121320344 Reorder the terms: -2 + y = -2.121320344 Solving -2 + y = -2.121320344 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + y = -2.121320344 + 2 Combine like terms: -2 + 2 = 0 0 + y = -2.121320344 + 2 y = -2.121320344 + 2 Combine like terms: -2.121320344 + 2 = -0.121320344 y = -0.121320344 Simplifying y = -0.121320344

Solution

The solution to the problem is based on the solutions from the subproblems. y = {4.121320344, -0.121320344}

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