Question

How many roots ( real and complex) describe the given polynomial function?

f(x)=x^3 +9x
A. three real roots
B . one real root and two complex roots
C. three complex roots
D. two real roots and one complex roots​

Answer 1

Answer: d

Explanation:

because after you multiply x 3 times you can use the 3 would be the square root of the number you got and a complex root you can't do that

For example: 9 x 3 = 27 the square root of 27 is 5.2 and that's is rounded