Home-Work in Math looks like this?

Question

A=2w to the second power + 4hw
Where A is the surface area of a square priem with a square base
of side W and with height H. Find A if
W=7cm, H=10cm

Answer 1

a = 2(w)(w)+4hw

simply substitute

a = 2(7)(7) +4(10)(7)

multiply out
a = 98 + 280

add
a = 378 sq cm