(3y*3y)-(5+5)+y=25

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Solution for (3y*3y)-(5+5)+y=25 equation:


Simplifying
(3y * 3y) + -1(5 + 5) + y = 25

Reorder the terms for easier multiplication:
(3 * 3y * y) + -1(5 + 5) + y = 25

Multiply 3 * 3
(9y * y) + -1(5 + 5) + y = 25

Multiply y * y
(9y2) + -1(5 + 5) + y = 25

Combine like terms: 5 + 5 = 10
(9y2) + -1(10) + y = 25

Multiply -1 * 10
(9y2) + -10 + y = 25

Reorder the terms:
-10 + y + (9y2) = 25

Solving
-10 + y + (9y2) = 25

Solving for variable 'y'.

Reorder the terms:
-10 + -25 + y + (9y2) = 25 + -25

Combine like terms: -10 + -25 = -35
-35 + y + (9y2) = 25 + -25

Combine like terms: 25 + -25 = 0
-35 + y + (9y2) = 0

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

Divide each side by '9'.
-3.888888889 + 0.1111111111y + y2 = 0

Move the constant term to the right:

Add '3.888888889' to each side of the equation.
-3.888888889 + 0.1111111111y + 3.888888889 + y2 = 0 + 3.888888889

Reorder the terms:
-3.888888889 + 3.888888889 + 0.1111111111y + y2 = 0 + 3.888888889

Combine like terms: -3.888888889 + 3.888888889 = 0.000000000
0.000000000 + 0.1111111111y + y2 = 0 + 3.888888889
0.1111111111y + y2 = 0 + 3.888888889

Combine like terms: 0 + 3.888888889 = 3.888888889
0.1111111111y + y2 = 3.888888889

The y term is y.  Take half its coefficient (0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
0.1111111111y + 0.25 + y2 = 3.888888889 + 0.25

Reorder the terms:
0.25 + 0.1111111111y + y2 = 3.888888889 + 0.25

Combine like terms: 3.888888889 + 0.25 = 4.138888889
0.25 + 0.1111111111y + y2 = 4.138888889

Factor a perfect square on the left side:
((y) + 0.5)((y) + 0.5) = 4.138888889

Calculate the square root of the right side: 2.034425936

Break this problem into two subproblems by setting 
((y) + 0.5) equal to 2.034425936 and -2.034425936.

Subproblem 1

(y) + 0.5 = 2.034425936 Simplifying (y) + 0.5 = 2.034425936 y + 0.5 = 2.034425936 Reorder the terms: 0.5 + y = 2.034425936 Solving 0.5 + y = 2.034425936 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + y = 2.034425936 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + y = 2.034425936 + -0.5 y = 2.034425936 + -0.5 Combine like terms: 2.034425936 + -0.5 = 1.534425936 y = 1.534425936 Simplifying y = 1.534425936

Subproblem 2

(y) + 0.5 = -2.034425936 Simplifying (y) + 0.5 = -2.034425936 y + 0.5 = -2.034425936 Reorder the terms: 0.5 + y = -2.034425936 Solving 0.5 + y = -2.034425936 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + y = -2.034425936 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + y = -2.034425936 + -0.5 y = -2.034425936 + -0.5 Combine like terms: -2.034425936 + -0.5 = -2.534425936 y = -2.534425936 Simplifying y = -2.534425936

Solution

The solution to the problem is based on the solutions from the subproblems. y = {1.534425936, -2.534425936}

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