-2a^2-3a-3=0

Solution for -2a^2-3a-3=0 equation:

Simplifying
-2a2 + -3a + -3 = 0

Reorder the terms:
-3 + -3a + -2a2 = 0

Solving
-3 + -3a + -2a2 = 0

Solving for variable 'a'.

Factor out the Greatest Common Factor (GCF), '-1'.
-1(3 + 3a + 2a2) = 0

Ignore the factor -1.
Subproblem 1
Set the factor '(3 + 3a + 2a2)' equal to zero and attempt to solve:

Simplifying
3 + 3a + 2a2 = 0

Solving
3 + 3a + 2a2 = 0

Begin completing the square.  Divide all terms by
2 the coefficient of the squared term: 

Divide each side by '2'.
1.5 + 1.5a + a2 = 0

Move the constant term to the right:

Add '-1.5' to each side of the equation.
1.5 + 1.5a + -1.5 + a2 = 0 + -1.5

Reorder the terms:
1.5 + -1.5 + 1.5a + a2 = 0 + -1.5

Combine like terms: 1.5 + -1.5 = 0.0
0.0 + 1.5a + a2 = 0 + -1.5
1.5a + a2 = 0 + -1.5

Combine like terms: 0 + -1.5 = -1.5
1.5a + a2 = -1.5

The a term is 1.5a.  Take half its coefficient (0.75).
Square it (0.5625) and add it to both sides.

Add '0.5625' to each side of the equation.
1.5a + 0.5625 + a2 = -1.5 + 0.5625

Reorder the terms:
0.5625 + 1.5a + a2 = -1.5 + 0.5625

Combine like terms: -1.5 + 0.5625 = -0.9375
0.5625 + 1.5a + a2 = -0.9375

Factor a perfect square on the left side:
(a + 0.75)(a + 0.75) = -0.9375

Can't calculate square root of the right side.

The solution to this equation could not be determined.

This subproblem is being ignored because a solution could not be determined.

The solution to this equation could not be determined.