y^2-25y+54=0

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Solution for y^2-25y+54=0 equation:


Simplifying
y2 + -25y + 54 = 0

Reorder the terms:
54 + -25y + y2 = 0

Solving
54 + -25y + y2 = 0

Solving for variable 'y'.

Begin completing the square.

Move the constant term to the right:

Add '-54' to each side of the equation.
54 + -25y + -54 + y2 = 0 + -54

Reorder the terms:
54 + -54 + -25y + y2 = 0 + -54

Combine like terms: 54 + -54 = 0
0 + -25y + y2 = 0 + -54
-25y + y2 = 0 + -54

Combine like terms: 0 + -54 = -54
-25y + y2 = -54

The y term is -25y.  Take half its coefficient (-12.5).
Square it (156.25) and add it to both sides.

Add '156.25' to each side of the equation.
-25y + 156.25 + y2 = -54 + 156.25

Reorder the terms:
156.25 + -25y + y2 = -54 + 156.25

Combine like terms: -54 + 156.25 = 102.25
156.25 + -25y + y2 = 102.25

Factor a perfect square on the left side:
(y + -12.5)(y + -12.5) = 102.25

Calculate the square root of the right side: 10.111874208

Break this problem into two subproblems by setting 
(y + -12.5) equal to 10.111874208 and -10.111874208.

Subproblem 1

y + -12.5 = 10.111874208 Simplifying y + -12.5 = 10.111874208 Reorder the terms: -12.5 + y = 10.111874208 Solving -12.5 + y = 10.111874208 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '12.5' to each side of the equation. -12.5 + 12.5 + y = 10.111874208 + 12.5 Combine like terms: -12.5 + 12.5 = 0.0 0.0 + y = 10.111874208 + 12.5 y = 10.111874208 + 12.5 Combine like terms: 10.111874208 + 12.5 = 22.611874208 y = 22.611874208 Simplifying y = 22.611874208

Subproblem 2

y + -12.5 = -10.111874208 Simplifying y + -12.5 = -10.111874208 Reorder the terms: -12.5 + y = -10.111874208 Solving -12.5 + y = -10.111874208 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '12.5' to each side of the equation. -12.5 + 12.5 + y = -10.111874208 + 12.5 Combine like terms: -12.5 + 12.5 = 0.0 0.0 + y = -10.111874208 + 12.5 y = -10.111874208 + 12.5 Combine like terms: -10.111874208 + 12.5 = 2.388125792 y = 2.388125792 Simplifying y = 2.388125792

Solution

The solution to the problem is based on the solutions from the subproblems. y = {22.611874208, 2.388125792}

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