Question

4r² - 2s³ for r = 1 and s = 5 Thanks!

Answer 1

4r^2=4 if r=1
2s^3=250 if s=5

Answer 2

So we are given constants for this problem and looking at it, all we need to do is replace  r & s with the numbers in the equation.

4(1)^2-2(5)^3 we will get -246