ben writes an expression for sum of 1 cubed, 2 cubed and 3 cubed. what is the value of the expression

A "sum" is the addition of all of the terms. (In this case )

is equal to

is equal to

is equal to

Now you must add those terms.

Now you have the answer! :D

a.

step-by-step explanation:

step 1 distribute 2 to every term in the parentheses

step 2 add 10 on both sides of the equal sign