Which expression is a sum of cubes?

A) -27a^ b^6 + 8a^9 b^12

B) -9a^3 b^6 + a^9 b^10

C) 9a^3 b^6 + 8a^9 b^12

D) 27a^3 b^6 + 8a^9 b^12

Step-by-step explanation:

Here, the given expressions are:

So, the above expression is "sum of cubes".

But (-9) can not be expressed as a Perfect cube root.

So, the above expression is not "sum of cubes".

But (9) can not be expressed as a Perfect cube root.

So, the above expression is not "sum of cubes".

So, the above expression is  "sum of cubes".

D on E2020

Step-by-step explanation:

a

step-by-step explanation:

jjddbdhid r

1/3 + 1/3 ≠ 2/6 because 1/3 alone = 2/6  

step by step explanation:

1/3 + 1/3 = 2/3       2/3=4/6