Question

How would the expression x^3+27 be rewritten using Sum of Cubes?

Answer 1

The basic formula is this:

\[\large{a^3 + b^3 = (a+b)(a^2-ab+b^2)}\]

Answer 2

Now your expression can be written as:

\[\large{x^3 + 27 = x^3 + 3^3}\]

Compare this with the formula I mentioned above

Answer 3

but i dont understand because there isnt an answer like that.

A.(x+3)(x^2+3x-9)
B.(x+3)(x^2-3x+9)
C.(x-3)(x^2-3x+9)
D.(x+3)(x^2-3x-9)