2b^2-3b-27=0

Solution for 2b^2-3b-27=0 equation:

Simplifying
2b2 + -3b + -27 = 0

Reorder the terms:
-27 + -3b + 2b2 = 0

Solving
-27 + -3b + 2b2 = 0

Solving for variable 'b'.

Factor a trinomial.
(-3 + -1b)(9 + -2b) = 0

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

Simplifying
-3 + -1b = 0

Solving
-3 + -1b = 0

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

Add '3' to each side of the equation.
-3 + 3 + -1b = 0 + 3

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

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

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

Simplifying
b = -3
Subproblem 2
Set the factor '(9 + -2b)' equal to zero and attempt to solve:

Simplifying
9 + -2b = 0

Solving
9 + -2b = 0

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

Add '-9' to each side of the equation.
9 + -9 + -2b = 0 + -9

Combine like terms: 9 + -9 = 0
0 + -2b = 0 + -9
-2b = 0 + -9

Combine like terms: 0 + -9 = -9
-2b = -9

Divide each side by '-2'.
b = 4.5

Simplifying
b = 4.5
Solution
b = {-3, 4.5}