Im stumped on Expressions right now, and dont know how to simplify 5x^2t^-1, or evaluate a^3b^-1 , could someone help?

Question

Simplify 5x²t^-1

^{And Evaluate}

a³b^{-1 When a=2 and b=-4}

Answer 1

You probably want: (5x^2)t^-1 = (5x^2)/t

unless you meant 5x^(2t^-1) = 5x^(2/t)

sometimes it's unclear depending on implicit parentheses

a^3b^-1 = (a^3)/(b)= [(2)^3]/[(-4)]= 8/-4 = -2