(a*9)(a*4)=

Solution for (a*9)(a*4)= equation:

Simplifying
(a * 9)(a * 4) = 0

Reorder the terms for easier multiplication:
(9a)(a * 4) = 0

Remove parenthesis around (9a)
9a(a * 4) = 0

Reorder the terms for easier multiplication:
9a(4a) = 0

Remove parenthesis around (4a)
9a * 4a = 0

Reorder the terms for easier multiplication:
9 * 4a * a = 0

Multiply 9 * 4
36a * a = 0

Multiply a * a
36a2 = 0

Solving
36a2 = 0

Solving for variable 'a'.

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

Divide each side by '36'.
a2 = 0

Simplifying
a2 = 0

Take the square root of each side:
a = {0}