A manufacturer of shipping boxes has a box shaped like a cube. The side length is
(5a + 4b)
. What is the volume of the box in terms of a and b?

Question

A manufacturer of shipping boxes has a box shaped like a cube. The side length is
(5a + 4b)
. What is the volume of the box in terms of a and b?

calculusxy · Answer

$$\large (5a + 4b)^3$$

it is like:
$$\large (5a+4b)(5a + 4b)(5a + 4b)$$

i would use FOIL so let's start with 
$$\large (5a+4b)(5a+4b)$$

calculusxy · Answer

$$\large (5a \times 5a) + (5a \times 4b) + (4b \times 5a) + (4b \times 4b)$$

calculusxy · Answer

$$\large (5a + 4b)(25a^2 + 20ab + 20ba +16b^2)$$

calculusxy · Answer

Continue using FOIL

anonymous · Answer

whenever i watched the example video it had something to do with some kind of triangle not foil let me up load the video real quick

anonymous · Answer

calculusxy · Answer

i think i understand this:
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