Question

Factor the following expression completely:
27x3 + y3
Choose one answer.
a. (3x + y)(9x² - 3xy + y²)
b. 27(x³ + y³)
c. (x+y)(27x + y)
d. (x²-y²)(x-y)

Answer 1

answer is a

Answer 2

a. (3x + y)(9x² - 3xy + y²)

Answer 3

If you have some questions like this, Then try to do reversely. I mean select one or two answers which is related to our question.
In this case x and y have the power of 3. a,b,d only gives us the power of 3. and we know that b is not equal to 27x3 + y3, so 2 of the answers are remaining !

Answer 4

from that two you can find the answer easily :)

Answer 5

Thank you all!! :)