45y^2-45y-88=0

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Solution for 45y^2-45y-88=0 equation:


Simplifying
45y2 + -45y + -88 = 0

Reorder the terms:
-88 + -45y + 45y2 = 0

Solving
-88 + -45y + 45y2 = 0

Solving for variable 'y'.

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

Divide each side by '45'.
-1.955555556 + -1y + y2 = 0

Move the constant term to the right:

Add '1.955555556' to each side of the equation.
-1.955555556 + -1y + 1.955555556 + y2 = 0 + 1.955555556

Reorder the terms:
-1.955555556 + 1.955555556 + -1y + y2 = 0 + 1.955555556

Combine like terms: -1.955555556 + 1.955555556 = 0.000000000
0.000000000 + -1y + y2 = 0 + 1.955555556
-1y + y2 = 0 + 1.955555556

Combine like terms: 0 + 1.955555556 = 1.955555556
-1y + y2 = 1.955555556

The y term is -1y.  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.
-1y + 0.25 + y2 = 1.955555556 + 0.25

Reorder the terms:
0.25 + -1y + y2 = 1.955555556 + 0.25

Combine like terms: 1.955555556 + 0.25 = 2.205555556
0.25 + -1y + y2 = 2.205555556

Factor a perfect square on the left side:
(y + -0.5)(y + -0.5) = 2.205555556

Calculate the square root of the right side: 1.485111294

Break this problem into two subproblems by setting 
(y + -0.5) equal to 1.485111294 and -1.485111294.

Subproblem 1

y + -0.5 = 1.485111294 Simplifying y + -0.5 = 1.485111294 Reorder the terms: -0.5 + y = 1.485111294 Solving -0.5 + y = 1.485111294 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 = 1.485111294 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + y = 1.485111294 + 0.5 y = 1.485111294 + 0.5 Combine like terms: 1.485111294 + 0.5 = 1.985111294 y = 1.985111294 Simplifying y = 1.985111294

Subproblem 2

y + -0.5 = -1.485111294 Simplifying y + -0.5 = -1.485111294 Reorder the terms: -0.5 + y = -1.485111294 Solving -0.5 + y = -1.485111294 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 = -1.485111294 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + y = -1.485111294 + 0.5 y = -1.485111294 + 0.5 Combine like terms: -1.485111294 + 0.5 = -0.985111294 y = -0.985111294 Simplifying y = -0.985111294

Solution

The solution to the problem is based on the solutions from the subproblems. y = {1.985111294, -0.985111294}

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