a^2+0a+15=9-5a

Solution for a^2+0a+15=9-5a equation:

Simplifying
a2 + 0a + 15 = 9 + -5a

Anything times zero is zero.
a2 + 0a + 15 = 9 + -5a

Reorder the terms:
0 + 15 + a2 = 9 + -5a

Combine like terms: 0 + 15 = 15
15 + a2 = 9 + -5a

Solving
15 + a2 = 9 + -5a

Solving for variable 'a'.

Reorder the terms:
15 + -9 + 5a + a2 = 9 + -5a + -9 + 5a

Combine like terms: 15 + -9 = 6
6 + 5a + a2 = 9 + -5a + -9 + 5a

Reorder the terms:
6 + 5a + a2 = 9 + -9 + -5a + 5a

Combine like terms: 9 + -9 = 0
6 + 5a + a2 = 0 + -5a + 5a
6 + 5a + a2 = -5a + 5a

Combine like terms: -5a + 5a = 0
6 + 5a + a2 = 0

Factor a trinomial.
(3 + a)(2 + a) = 0

Subproblem 1
Set the factor '(3 + a)' equal to zero and attempt to solve:

Simplifying
3 + a = 0

Solving
3 + a = 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 + a = 0 + -3

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

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

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

Simplifying
2 + a = 0

Solving
2 + a = 0

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

Add '-2' to each side of the equation.
2 + -2 + a = 0 + -2

Combine like terms: 2 + -2 = 0
0 + a = 0 + -2
a = 0 + -2

Combine like terms: 0 + -2 = -2
a = -2

Simplifying
a = -2
Solution
a = {-3, -2}