(3a)(7a)+(4a)(3a)=

Solution for (3a)(7a)+(4a)(3a)= equation:

Simplifying
(3a)(7a) + (4a)(3a) = 0

Remove parenthesis around (3a)
3a(7a) + (4a)(3a) = 0

Remove parenthesis around (7a)
3a * 7a + (4a)(3a) = 0

Reorder the terms for easier multiplication:
3 * 7a * a + (4a)(3a) = 0

Multiply 3 * 7
21a * a + (4a)(3a) = 0

Multiply a * a
21a2 + (4a)(3a) = 0

Remove parenthesis around (4a)
21a2 + 4a(3a) = 0

Remove parenthesis around (3a)
21a2 + 4a * 3a = 0

Reorder the terms for easier multiplication:
21a2 + 4 * 3a * a = 0

Multiply 4 * 3
21a2 + 12a * a = 0

Multiply a * a
21a2 + 12a2 = 0

Combine like terms: 21a2 + 12a2 = 33a2
33a2 = 0

Solving
33a2 = 0

Solving for variable 'a'.

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

Divide each side by '33'.
a2 = 0

Simplifying
a2 = 0

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