105a^2-33a-18=

Solution for 105a^2-33a-18= equation:

Simplifying
105a2 + -33a + -18 = 0

Reorder the terms:
-18 + -33a + 105a2 = 0

Solving
-18 + -33a + 105a2 = 0

Solving for variable 'a'.

Factor out the Greatest Common Factor (GCF), '3'.
3(-6 + -11a + 35a2) = 0

Factor a trinomial.
3((-2 + -7a)(3 + -5a)) = 0

Ignore the factor 3.
Subproblem 1
Set the factor '(-2 + -7a)' equal to zero and attempt to solve:

Simplifying
-2 + -7a = 0

Solving
-2 + -7a = 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 + -7a = 0 + 2

Combine like terms: -2 + 2 = 0
0 + -7a = 0 + 2
-7a = 0 + 2

Combine like terms: 0 + 2 = 2
-7a = 2

Divide each side by '-7'.
a = -0.2857142857

Simplifying
a = -0.2857142857
Subproblem 2
Set the factor '(3 + -5a)' equal to zero and attempt to solve:

Simplifying
3 + -5a = 0

Solving
3 + -5a = 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 + -5a = 0 + -3

Combine like terms: 3 + -3 = 0
0 + -5a = 0 + -3
-5a = 0 + -3

Combine like terms: 0 + -3 = -3
-5a = -3

Divide each side by '-5'.
a = 0.6

Simplifying
a = 0.6
Solution
a = {-0.2857142857, 0.6}