Question

a. Find the surface area of the cube.
b. Find the volume of the cube.

Answer 1

The cube has equal lengths everywhere. So the area of a single face of the cube would be (4x-5)^2. There are 6 faces. How would that solve for the surface area?

Answer 2

ok so if it's a cube, all of the side lengths are equal yes? :)

so for volume, we need to multiply
(length)(width)(height)=
(4x-5)(4x-5)(4x-5)

Answer 3

lol @zepdrix we've synchronized our answers just perfectly.

Answer 4

XD

Answer 5

So the volume would be -1?
What about surface area

Answer 6

The volume can't be -1, otherwise you're dealing with some otherworldly cube lol. Are you sure x=1?

Answer 7

hahaha i dont know what im doing

Answer 8

Just assume x is x, so compute (4x-5)^3 = 64x^3 - 240x^2 + 300x - 125. Don't try to solve that by hand, you will suffocate lol

Answer 9

LOL, So the volume is 64x^3 - 240x^2 + 300x - 125?

Answer 10

Yeah, for the surface area, you have 6(4x-5)^2 = 96 x^2 - 240 x + 150

Answer 11

a. Surface area is 6(4x-5)^2 = 96 x^2 - 240 x + 150 or do i need to solve?
b. volme is 64x^3 - 240x^2 + 300x - 125

Answer 12

yeah.. no dont solve. You don't have x. Just put that.

Answer 13

thanks :)

Answer 14

you're welcome ;)