Question

SOLVE: 2s3 cubed-4r2 squared and if r=1 and s=5
please help i dont get this0

Answer 1

\[\large 2s^3 - 4r^2\]

We have an expression...and we are told to solve it when r = 1 and s = 5

So all we need to do is replace every 'r' we see with 1...and replace every 's' with 5

So:

\[\large 2(5)^3 - 4(1)^2 = ?\]