(y-k)(y-k)=

Solution for (y-k)(y-k)= equation:

Simplifying
(y + -1k)(y + -1k) = 0

Reorder the terms:
(-1k + y)(y + -1k) = 0

Reorder the terms:
(-1k + y)(-1k + y) = 0

Multiply (-1k + y) * (-1k + y)
(-1k * (-1k + y) + y(-1k + y)) = 0
((-1k * -1k + y * -1k) + y(-1k + y)) = 0

Reorder the terms:
((-1ky + 1k2) + y(-1k + y)) = 0
((-1ky + 1k2) + y(-1k + y)) = 0
(-1ky + 1k2 + (-1k * y + y * y)) = 0
(-1ky + 1k2 + (-1ky + y2)) = 0

Reorder the terms:
(-1ky + -1ky + 1k2 + y2) = 0

Combine like terms: -1ky + -1ky = -2ky
(-2ky + 1k2 + y2) = 0

Solving
-2ky + 1k2 + y2 = 0

Solving for variable 'k'.

Factor a trinomial.
(k + -1y)(k + -1y) = 0

Subproblem 1
Set the factor '(k + -1y)' equal to zero and attempt to solve:

Simplifying
k + -1y = 0

Solving
k + -1y = 0

Move all terms containing k to the left, all other terms to the right.

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

Combine like terms: -1y + y = 0
k + 0 = 0 + y
k = 0 + y
Remove the zero:
k = y

Simplifying
k = y
Subproblem 2
Set the factor '(k + -1y)' equal to zero and attempt to solve:

Simplifying
k + -1y = 0

Solving
k + -1y = 0

Move all terms containing k to the left, all other terms to the right.

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

Combine like terms: -1y + y = 0
k + 0 = 0 + y
k = 0 + y
Remove the zero:
k = y

Simplifying
k = y
Solution
k = {y, y}