y(4y-3)=4(2y+6)

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Solution for y(4y-3)=4(2y+6) equation:


Simplifying
y(4y + -3) = 4(2y + 6)

Reorder the terms:
y(-3 + 4y) = 4(2y + 6)
(-3 * y + 4y * y) = 4(2y + 6)
(-3y + 4y2) = 4(2y + 6)

Reorder the terms:
-3y + 4y2 = 4(6 + 2y)
-3y + 4y2 = (6 * 4 + 2y * 4)
-3y + 4y2 = (24 + 8y)

Solving
-3y + 4y2 = 24 + 8y

Solving for variable 'y'.

Reorder the terms:
-24 + -3y + -8y + 4y2 = 24 + 8y + -24 + -8y

Combine like terms: -3y + -8y = -11y
-24 + -11y + 4y2 = 24 + 8y + -24 + -8y

Reorder the terms:
-24 + -11y + 4y2 = 24 + -24 + 8y + -8y

Combine like terms: 24 + -24 = 0
-24 + -11y + 4y2 = 0 + 8y + -8y
-24 + -11y + 4y2 = 8y + -8y

Combine like terms: 8y + -8y = 0
-24 + -11y + 4y2 = 0

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

Divide each side by '4'.
-6 + -2.75y + y2 = 0

Move the constant term to the right:

Add '6' to each side of the equation.
-6 + -2.75y + 6 + y2 = 0 + 6

Reorder the terms:
-6 + 6 + -2.75y + y2 = 0 + 6

Combine like terms: -6 + 6 = 0
0 + -2.75y + y2 = 0 + 6
-2.75y + y2 = 0 + 6

Combine like terms: 0 + 6 = 6
-2.75y + y2 = 6

The y term is -2.75y.  Take half its coefficient (-1.375).
Square it (1.890625) and add it to both sides.

Add '1.890625' to each side of the equation.
-2.75y + 1.890625 + y2 = 6 + 1.890625

Reorder the terms:
1.890625 + -2.75y + y2 = 6 + 1.890625

Combine like terms: 6 + 1.890625 = 7.890625
1.890625 + -2.75y + y2 = 7.890625

Factor a perfect square on the left side:
(y + -1.375)(y + -1.375) = 7.890625

Calculate the square root of the right side: 2.809025632

Break this problem into two subproblems by setting 
(y + -1.375) equal to 2.809025632 and -2.809025632.

Subproblem 1

y + -1.375 = 2.809025632 Simplifying y + -1.375 = 2.809025632 Reorder the terms: -1.375 + y = 2.809025632 Solving -1.375 + y = 2.809025632 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '1.375' to each side of the equation. -1.375 + 1.375 + y = 2.809025632 + 1.375 Combine like terms: -1.375 + 1.375 = 0.000 0.000 + y = 2.809025632 + 1.375 y = 2.809025632 + 1.375 Combine like terms: 2.809025632 + 1.375 = 4.184025632 y = 4.184025632 Simplifying y = 4.184025632

Subproblem 2

y + -1.375 = -2.809025632 Simplifying y + -1.375 = -2.809025632 Reorder the terms: -1.375 + y = -2.809025632 Solving -1.375 + y = -2.809025632 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '1.375' to each side of the equation. -1.375 + 1.375 + y = -2.809025632 + 1.375 Combine like terms: -1.375 + 1.375 = 0.000 0.000 + y = -2.809025632 + 1.375 y = -2.809025632 + 1.375 Combine like terms: -2.809025632 + 1.375 = -1.434025632 y = -1.434025632 Simplifying y = -1.434025632

Solution

The solution to the problem is based on the solutions from the subproblems. y = {4.184025632, -1.434025632}

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