20b^2-15b=

Solution for 20b^2-15b= equation:

Simplifying
20b2 + -15b = 0

Reorder the terms:
-15b + 20b2 = 0

Solving
-15b + 20b2 = 0

Solving for variable 'b'.

Factor out the Greatest Common Factor (GCF), '5b'.
5b(-3 + 4b) = 0

Ignore the factor 5.
Subproblem 1
Set the factor 'b' equal to zero and attempt to solve:

Simplifying
b = 0

Solving
b = 0

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

Simplifying
b = 0
Subproblem 2
Set the factor '(-3 + 4b)' equal to zero and attempt to solve:

Simplifying
-3 + 4b = 0

Solving
-3 + 4b = 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 + 4b = 0 + 3

Combine like terms: -3 + 3 = 0
0 + 4b = 0 + 3
4b = 0 + 3

Combine like terms: 0 + 3 = 3
4b = 3

Divide each side by '4'.
b = 0.75

Simplifying
b = 0.75
Solution
b = {0, 0.75}