y^2-28y+64=0

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Solution for y^2-28y+64=0 equation:


Simplifying
y2 + -28y + 64 = 0

Reorder the terms:
64 + -28y + y2 = 0

Solving
64 + -28y + y2 = 0

Solving for variable 'y'.

Begin completing the square.

Move the constant term to the right:

Add '-64' to each side of the equation.
64 + -28y + -64 + y2 = 0 + -64

Reorder the terms:
64 + -64 + -28y + y2 = 0 + -64

Combine like terms: 64 + -64 = 0
0 + -28y + y2 = 0 + -64
-28y + y2 = 0 + -64

Combine like terms: 0 + -64 = -64
-28y + y2 = -64

The y term is -28y.  Take half its coefficient (-14).
Square it (196) and add it to both sides.

Add '196' to each side of the equation.
-28y + 196 + y2 = -64 + 196

Reorder the terms:
196 + -28y + y2 = -64 + 196

Combine like terms: -64 + 196 = 132
196 + -28y + y2 = 132

Factor a perfect square on the left side:
(y + -14)(y + -14) = 132

Calculate the square root of the right side: 11.489125293

Break this problem into two subproblems by setting 
(y + -14) equal to 11.489125293 and -11.489125293.

Subproblem 1

y + -14 = 11.489125293 Simplifying y + -14 = 11.489125293 Reorder the terms: -14 + y = 11.489125293 Solving -14 + y = 11.489125293 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '14' to each side of the equation. -14 + 14 + y = 11.489125293 + 14 Combine like terms: -14 + 14 = 0 0 + y = 11.489125293 + 14 y = 11.489125293 + 14 Combine like terms: 11.489125293 + 14 = 25.489125293 y = 25.489125293 Simplifying y = 25.489125293

Subproblem 2

y + -14 = -11.489125293 Simplifying y + -14 = -11.489125293 Reorder the terms: -14 + y = -11.489125293 Solving -14 + y = -11.489125293 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '14' to each side of the equation. -14 + 14 + y = -11.489125293 + 14 Combine like terms: -14 + 14 = 0 0 + y = -11.489125293 + 14 y = -11.489125293 + 14 Combine like terms: -11.489125293 + 14 = 2.510874707 y = 2.510874707 Simplifying y = 2.510874707

Solution

The solution to the problem is based on the solutions from the subproblems. y = {25.489125293, 2.510874707}

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