13a^2-33a-18=0

Solution for 13a^2-33a-18=0 equation:

Simplifying
13a2 + -33a + -18 = 0

Reorder the terms:
-18 + -33a + 13a2 = 0

Solving
-18 + -33a + 13a2 = 0

Solving for variable 'a'.

Factor a trinomial.
(-6 + -13a)(3 + -1a) = 0

Subproblem 1
Set the factor '(-6 + -13a)' equal to zero and attempt to solve:

Simplifying
-6 + -13a = 0

Solving
-6 + -13a = 0

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

Add '6' to each side of the equation.
-6 + 6 + -13a = 0 + 6

Combine like terms: -6 + 6 = 0
0 + -13a = 0 + 6
-13a = 0 + 6

Combine like terms: 0 + 6 = 6
-13a = 6

Divide each side by '-13'.
a = -0.4615384615

Simplifying
a = -0.4615384615
Subproblem 2
Set the factor '(3 + -1a)' equal to zero and attempt to solve:

Simplifying
3 + -1a = 0

Solving
3 + -1a = 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 + -1a = 0 + -3

Combine like terms: 3 + -3 = 0
0 + -1a = 0 + -3
-1a = 0 + -3

Combine like terms: 0 + -3 = -3
-1a = -3

Divide each side by '-1'.
a = 3

Simplifying
a = 3
Solution
a = {-0.4615384615, 3}