Answer:
16x^2-24x+9
Step-by-step explanation:
expand equation:
(4x-3)(4x-3)
distribute:
4x(4x-3) - 3(4x-3)
16x^2-12x - 12x+9
combine like terms:
hope this helps!
8/3
fortnight
140672
formula for cone volume=pi*r^2*h*1/3
80^2*3.14*21=422016
422016*1/3
=140672
