Question

which of the following is the correct factoring of x^3+27?
a)(x+3)(x+3)(x+3)
b)(x+3)(x-3)(x-3)
c)(x+3)(x^2+3x+9)
d)(x+3)(x^2-3x-9)
e)(x-3)(x^2-3x+9)

Answer 1

none of the above

Answer 2

x^3+27=(x+3)(x^2-3x+9)
and also there was one of question of yours
it was somehting like this
x^2+10x-70=(x+9)(x+b)
what is a+b
you never said anything about a

so
i assumed you meant
x^2+10x-70=(x-7)(x+10)

so 10-7=3

Answer 3

it should be:
(x+3)(x^2 -3x +9)