5y+2y(y-6)=4(y+1)-2

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Solution for 5y+2y(y-6)=4(y+1)-2 equation:


Simplifying
5y + 2y(y + -6) = 4(y + 1) + -2

Reorder the terms:
5y + 2y(-6 + y) = 4(y + 1) + -2
5y + (-6 * 2y + y * 2y) = 4(y + 1) + -2
5y + (-12y + 2y2) = 4(y + 1) + -2

Combine like terms: 5y + -12y = -7y
-7y + 2y2 = 4(y + 1) + -2

Reorder the terms:
-7y + 2y2 = 4(1 + y) + -2
-7y + 2y2 = (1 * 4 + y * 4) + -2
-7y + 2y2 = (4 + 4y) + -2

Reorder the terms:
-7y + 2y2 = 4 + -2 + 4y

Combine like terms: 4 + -2 = 2
-7y + 2y2 = 2 + 4y

Solving
-7y + 2y2 = 2 + 4y

Solving for variable 'y'.

Reorder the terms:
-2 + -7y + -4y + 2y2 = 2 + 4y + -2 + -4y

Combine like terms: -7y + -4y = -11y
-2 + -11y + 2y2 = 2 + 4y + -2 + -4y

Reorder the terms:
-2 + -11y + 2y2 = 2 + -2 + 4y + -4y

Combine like terms: 2 + -2 = 0
-2 + -11y + 2y2 = 0 + 4y + -4y
-2 + -11y + 2y2 = 4y + -4y

Combine like terms: 4y + -4y = 0
-2 + -11y + 2y2 = 0

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

Divide each side by '2'.
-1 + -5.5y + y2 = 0

Move the constant term to the right:

Add '1' to each side of the equation.
-1 + -5.5y + 1 + y2 = 0 + 1

Reorder the terms:
-1 + 1 + -5.5y + y2 = 0 + 1

Combine like terms: -1 + 1 = 0
0 + -5.5y + y2 = 0 + 1
-5.5y + y2 = 0 + 1

Combine like terms: 0 + 1 = 1
-5.5y + y2 = 1

The y term is -5.5y.  Take half its coefficient (-2.75).
Square it (7.5625) and add it to both sides.

Add '7.5625' to each side of the equation.
-5.5y + 7.5625 + y2 = 1 + 7.5625

Reorder the terms:
7.5625 + -5.5y + y2 = 1 + 7.5625

Combine like terms: 1 + 7.5625 = 8.5625
7.5625 + -5.5y + y2 = 8.5625

Factor a perfect square on the left side:
(y + -2.75)(y + -2.75) = 8.5625

Calculate the square root of the right side: 2.926174978

Break this problem into two subproblems by setting 
(y + -2.75) equal to 2.926174978 and -2.926174978.

Subproblem 1

y + -2.75 = 2.926174978 Simplifying y + -2.75 = 2.926174978 Reorder the terms: -2.75 + y = 2.926174978 Solving -2.75 + y = 2.926174978 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '2.75' to each side of the equation. -2.75 + 2.75 + y = 2.926174978 + 2.75 Combine like terms: -2.75 + 2.75 = 0.00 0.00 + y = 2.926174978 + 2.75 y = 2.926174978 + 2.75 Combine like terms: 2.926174978 + 2.75 = 5.676174978 y = 5.676174978 Simplifying y = 5.676174978

Subproblem 2

y + -2.75 = -2.926174978 Simplifying y + -2.75 = -2.926174978 Reorder the terms: -2.75 + y = -2.926174978 Solving -2.75 + y = -2.926174978 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '2.75' to each side of the equation. -2.75 + 2.75 + y = -2.926174978 + 2.75 Combine like terms: -2.75 + 2.75 = 0.00 0.00 + y = -2.926174978 + 2.75 y = -2.926174978 + 2.75 Combine like terms: -2.926174978 + 2.75 = -0.176174978 y = -0.176174978 Simplifying y = -0.176174978

Solution

The solution to the problem is based on the solutions from the subproblems. y = {5.676174978, -0.176174978}

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