Question

The polynomial x³ + 8 is equal to

Answer 1

$x {3 } + 8 \\ x = \sqrt[3]{8 } \\ x = 2$

Answer 2

Answer;

(x + 2)  (x^2 - 2^x + 4)

Step-by-step explanation:

8  is the cube of   2  

 x^3 is the cube of   x^1

Factor :

            (x + 2)  

Factoring  x2 - 2x + 4  

The first term is,  x2  its coefficient is  1 .

The middle term is,  -2x  its coefficient is  -2 .

The last term, "the constant", is  +4  

Step-1 : Multiply the coefficient of the first term by the constant   1 • 4 = 4  

Step-2 : Find two factors of  4  whose sum equals the coefficient of the middle term, which is   -2 .

     -4    +    -1    =    -5  

     -2    +    -2    =    -4  

     -1    +    -4    =    -5  

     1    +    4    =    5  

     2    +    2    =    4  

     4    +    1    =    5  

it was not possible for real number

hence the facor is

(x + 2)  (x^2 - 2^x + 4)