Question

http://prntscr.com/37qgwi

@kc_kennylau

Answer 1

Remember the formula for the volume of cube?

Answer 2

no

Answer 3

if the side of box is x, then volume is x^3.
we compute (5a + 4b)^3
there is a formula for computing the type of function.

Answer 4

V=A^3

Answer 5

i still didnt get it

Answer 6

So, please multiply out (5a + 4b)^3 = (5a+4b)(5a+4b)(5a+4b).
Hint: (a+b)^2 = (a+b)(a+b) = a^2 + 2ab + b^2.
There is a corresponding formula for (a+b)^3, as Miracrown has already told you.
Please show your first steps towards solving this problem. Then you're more likely to get helpful responses.

Answer 7

A

Answer 8

A is (a+b)^3

Answer 9

Aren't you going to show your work, so that the rest of us know why you've chosen A?

Answer 10

ok

Answer 11

its alittle complicated

Answer 12

@Miracrown

Answer 13

Here you go, I hope the steps are clear to you!