3a(5a+7)=

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Solution for 3a(5a+7)= equation: 


Simplifying
3a(5a + 7) = 0

Reorder the terms:
3a(7 + 5a) = 0
(7 * 3a + 5a * 3a) = 0
(21a + 15a2) = 0

Solving
21a + 15a2 = 0

Solving for variable 'a'.

Factor out the Greatest Common Factor (GCF), '3a'.
3a(7 + 5a) = 0

Ignore the factor 3.

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 '(7 + 5a)' equal to zero and attempt to solve:

Simplifying
7 + 5a = 0

Solving
7 + 5a = 0

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

Add '-7' to each side of the equation.
7 + -7 + 5a = 0 + -7

Combine like terms: 7 + -7 = 0
0 + 5a = 0 + -7
5a = 0 + -7

Combine like terms: 0 + -7 = -7
5a = -7

Divide each side by '5'.
a = -1.4

Simplifying
a = -1.4
Solution
a = {0, -1.4}

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