4a^2b^2-5ab=

Solution for 4a^2b^2-5ab= equation:

Simplifying
4a2b2 + -5ab = 0

Reorder the terms:
-5ab + 4a2b2 = 0

Solving
-5ab + 4a2b2 = 0

Solving for variable 'a'.

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

Subproblem 1
Set the factor 'ab' equal to zero and attempt to solve:

Simplifying
ab = 0

Solving
ab = 0

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

Simplifying
ab = 0

The solution to this equation could not be determined.

This subproblem is being ignored because a solution could not be determined.
Subproblem 2
Set the factor '(-5 + 4ab)' equal to zero and attempt to solve:

Simplifying
-5 + 4ab = 0

Solving
-5 + 4ab = 0

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

Add '5' to each side of the equation.
-5 + 5 + 4ab = 0 + 5

Combine like terms: -5 + 5 = 0
0 + 4ab = 0 + 5
4ab = 0 + 5

Combine like terms: 0 + 5 = 5
4ab = 5

Divide each side by '4b'.
a = 1.25b-1

Simplifying
a = 1.25b-1
Solution
a = {1.25b-1}