4a(7a+3)=

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

Simplifying
4a(7a + 3) = 0

Reorder the terms:
4a(3 + 7a) = 0
(3 * 4a + 7a * 4a) = 0
(12a + 28a2) = 0

Solving
12a + 28a2 = 0

Solving for variable 'a'.

Factor out the Greatest Common Factor (GCF), '4a'.
4a(3 + 7a) = 0

Ignore the factor 4.
Subproblem 1
Set the factor 'a' equal to zero and attempt to solve:

Simplifying
a = 0

Solving
a = 0

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

Simplifying
a = 0
Subproblem 2
Set the factor '(3 + 7a)' equal to zero and attempt to solve:

Simplifying
3 + 7a = 0

Solving
3 + 7a = 0

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

Add '-3' to each side of the equation.
3 + -3 + 7a = 0 + -3

Combine like terms: 3 + -3 = 0
0 + 7a = 0 + -3
7a = 0 + -3

Combine like terms: 0 + -3 = -3
7a = -3

Divide each side by '7'.
a = -0.4285714286

Simplifying
a = -0.4285714286
Solution
a = {0, -0.4285714286}