AE wrote:

can any one elaborate this with example?

Hi

It is basically the powers multiplied.

For example if it were (2^2)^3 then it would be 2^6 the rules of exponentials.

Similarly we know that quantity A will have a negative exponent while Quantity B will have a positive exponent

Since x < 0 that means x will be negative. As a result, quantity A will have a positive exponent and quantity B will have a negative exponent.

25^(-6x) << quantity A

25^(6x) << quantity B

I hope this helps.