(2-a)(4-a)=

Solution for (2-a)(4-a)= equation:

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

Multiply (2 + -1a) * (4 + -1a)
(2(4 + -1a) + -1a * (4 + -1a)) = 0
((4 * 2 + -1a * 2) + -1a * (4 + -1a)) = 0
((8 + -2a) + -1a * (4 + -1a)) = 0
(8 + -2a + (4 * -1a + -1a * -1a)) = 0
(8 + -2a + (-4a + 1a2)) = 0

Combine like terms: -2a + -4a = -6a
(8 + -6a + 1a2) = 0

Solving
8 + -6a + 1a2 = 0

Solving for variable 'a'.

Factor a trinomial.
(2 + -1a)(4 + -1a) = 0

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

Simplifying
2 + -1a = 0

Solving
2 + -1a = 0

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

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

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

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

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

Simplifying
a = 2
Subproblem 2
Set the factor '(4 + -1a)' equal to zero and attempt to solve:

Simplifying
4 + -1a = 0

Solving
4 + -1a = 0

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

Add '-4' to each side of the equation.
4 + -4 + -1a = 0 + -4

Combine like terms: 4 + -4 = 0
0 + -1a = 0 + -4
-1a = 0 + -4

Combine like terms: 0 + -4 = -4
-1a = -4

Divide each side by '-1'.
a = 4

Simplifying
a = 4
Solution
a = {2, 4}