(5y+2)(5y+2)-96=0

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Solution for (5y+2)(5y+2)-96=0 equation:


Simplifying
(5y + 2)(5y + 2) + -96 = 0

Reorder the terms:
(2 + 5y)(5y + 2) + -96 = 0

Reorder the terms:
(2 + 5y)(2 + 5y) + -96 = 0

Multiply (2 + 5y) * (2 + 5y)
(2(2 + 5y) + 5y * (2 + 5y)) + -96 = 0
((2 * 2 + 5y * 2) + 5y * (2 + 5y)) + -96 = 0
((4 + 10y) + 5y * (2 + 5y)) + -96 = 0
(4 + 10y + (2 * 5y + 5y * 5y)) + -96 = 0
(4 + 10y + (10y + 25y2)) + -96 = 0

Combine like terms: 10y + 10y = 20y
(4 + 20y + 25y2) + -96 = 0

Reorder the terms:
4 + -96 + 20y + 25y2 = 0

Combine like terms: 4 + -96 = -92
-92 + 20y + 25y2 = 0

Solving
-92 + 20y + 25y2 = 0

Solving for variable 'y'.

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

Divide each side by '25'.
-3.68 + 0.8y + y2 = 0

Move the constant term to the right:

Add '3.68' to each side of the equation.
-3.68 + 0.8y + 3.68 + y2 = 0 + 3.68

Reorder the terms:
-3.68 + 3.68 + 0.8y + y2 = 0 + 3.68

Combine like terms: -3.68 + 3.68 = 0.00
0.00 + 0.8y + y2 = 0 + 3.68
0.8y + y2 = 0 + 3.68

Combine like terms: 0 + 3.68 = 3.68
0.8y + y2 = 3.68

The y term is 0.8y.  Take half its coefficient (0.4).
Square it (0.16) and add it to both sides.

Add '0.16' to each side of the equation.
0.8y + 0.16 + y2 = 3.68 + 0.16

Reorder the terms:
0.16 + 0.8y + y2 = 3.68 + 0.16

Combine like terms: 3.68 + 0.16 = 3.84
0.16 + 0.8y + y2 = 3.84

Factor a perfect square on the left side:
(y + 0.4)(y + 0.4) = 3.84

Calculate the square root of the right side: 1.959591794

Break this problem into two subproblems by setting 
(y + 0.4) equal to 1.959591794 and -1.959591794.

Subproblem 1

y + 0.4 = 1.959591794 Simplifying y + 0.4 = 1.959591794 Reorder the terms: 0.4 + y = 1.959591794 Solving 0.4 + y = 1.959591794 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-0.4' to each side of the equation. 0.4 + -0.4 + y = 1.959591794 + -0.4 Combine like terms: 0.4 + -0.4 = 0.0 0.0 + y = 1.959591794 + -0.4 y = 1.959591794 + -0.4 Combine like terms: 1.959591794 + -0.4 = 1.559591794 y = 1.559591794 Simplifying y = 1.559591794

Subproblem 2

y + 0.4 = -1.959591794 Simplifying y + 0.4 = -1.959591794 Reorder the terms: 0.4 + y = -1.959591794 Solving 0.4 + y = -1.959591794 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-0.4' to each side of the equation. 0.4 + -0.4 + y = -1.959591794 + -0.4 Combine like terms: 0.4 + -0.4 = 0.0 0.0 + y = -1.959591794 + -0.4 y = -1.959591794 + -0.4 Combine like terms: -1.959591794 + -0.4 = -2.359591794 y = -2.359591794 Simplifying y = -2.359591794

Solution

The solution to the problem is based on the solutions from the subproblems. y = {1.559591794, -2.359591794}

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