9a^2+18a+9=0

Solution for 9a^2+18a+9=0 equation:

Simplifying
9a2 + 18a + 9 = 0

Reorder the terms:
9 + 18a + 9a2 = 0

Solving
9 + 18a + 9a2 = 0

Solving for variable 'a'.

Factor out the Greatest Common Factor (GCF), '9'.
9(1 + 2a + a2) = 0

Factor a trinomial.
9((1 + a)(1 + a)) = 0

Ignore the factor 9.
Subproblem 1
Set the factor '(1 + a)' equal to zero and attempt to solve:

Simplifying
1 + a = 0

Solving
1 + a = 0

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

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

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

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

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

Simplifying
1 + a = 0

Solving
1 + a = 0

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

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

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

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

Simplifying
a = -1
Solution
a = {-1, -1}