Algbrea 2 Math

Question

Please help me out with this question

 

3x^3+24=

Answer 1

I assume, that

   3x^3 + 24 = 0 ,

then

   3x^3 = - 24
÷ 3          ÷ 3 

x^3 = - 8 

x^3 = (- 2)^3

x = - 2
~~~~~~~~

or the assignment is to factorize the given expression, then  

3x^3 + 24 = 3(x^3 + 8) = 

3(x + 2)(x^2 - 2x + 4)