(y-1)(2y-4)=0

Solution for (y-1)(2y-4)=0 equation:

Simplifying
(y + -1)(2y + -4) = 0

Reorder the terms:
(-1 + y)(2y + -4) = 0

Reorder the terms:
(-1 + y)(-4 + 2y) = 0

Multiply (-1 + y) * (-4 + 2y)
(-1(-4 + 2y) + y(-4 + 2y)) = 0
((-4 * -1 + 2y * -1) + y(-4 + 2y)) = 0
((4 + -2y) + y(-4 + 2y)) = 0
(4 + -2y + (-4 * y + 2y * y)) = 0
(4 + -2y + (-4y + 2y2)) = 0

Combine like terms: -2y + -4y = -6y
(4 + -6y + 2y2) = 0

Solving
4 + -6y + 2y2 = 0

Solving for variable 'y'.

Factor out the Greatest Common Factor (GCF), '2'.
2(2 + -3y + y2) = 0

Factor a trinomial.
2((1 + -1y)(2 + -1y)) = 0

Ignore the factor 2.
Subproblem 1
Set the factor '(1 + -1y)' equal to zero and attempt to solve:

Simplifying
1 + -1y = 0

Solving
1 + -1y = 0

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

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

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

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

Divide each side by '-1'.
y = 1

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

Simplifying
2 + -1y = 0

Solving
2 + -1y = 0

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

Add '-2' to each side of the equation.
2 + -2 + -1y = 0 + -2

Combine like terms: 2 + -2 = 0
0 + -1y = 0 + -2
-1y = 0 + -2

Combine like terms: 0 + -2 = -2
-1y = -2

Divide each side by '-1'.
y = 2

Simplifying
y = 2
Solution
y = {1, 2}