How do you simplify (2x-3) to the 2nd power

Step-by-step explanation:

(2x-3)^2

=(2^2)(x^2) +9 - 2*2*3*x

=4(x^2)+9 - 12x

By adding two hours to 6:30, you get 8:30, then add the remaining 18 minutes to get 8:48 PM.

Then for the second one, subtract 8:30 from 2:00 to get an elapsed time of 6 hours. We check this by adding 6 hours to 2:00, and we see it gets us to 8:30 PM.

:)