How would the expression x2 +8 be rewritten using sum of cubes?
a. (x+ 2)(x2 - 2x+4)
b. (x+2)(x2–2x - 4)
c. (x+2)(x2+2x-4)
d. (x-2)(2-2x+4)

So if they meant then the answer is:

.

The choice this corresponds to is A.

Step-by-step explanation:

The sum of cubes formula for factoring or expanding:

You have I'm assuming they meant:

.

Compare to .

You should see in place of you have .

You should also see in place of you have .

Let's check it for fun.

So we are going to use the distributive property.

We are going to distribute all the terms in the first ( ) to all the terms in the second ( ).

  +  

  +

Combine like terms:

Simplify the grouping of like terms:

0 times anything is 0:

5   1/4   miles per hour

step-by-step explanation:

15   3/4 / 3 = 5   1/4