Which statement is true about the given function? f(x) < 0 over the intervals (–infinity, –2.7) and (0.8, infinity). f(x) < 0 over the intervals (–infinity, –2.7) and (–1, 0.8). f(x) > 0 over the intervals (–infinity, –2.7) and (–1, 0.8). f(x) > 0 over the intervals (–infinity, –1) and (0.8, infinity).

f(x) < 0 over the intervals (–infinity, –2.7) and

(–1, 0.8).

Step-by-step explanation:

I got it right

x= -3 and

step-by-step explanation:

to find the roots of a cubic, use division or factoring to find the factors then set equal to 0. as this is a difference of cubes, it factors into

where a is the cube root of .

here   this is 27 and the cube root of 27 is 3. so we write using the form:

.

set each factor to 0 and solve for x.

x-3=0

x=3

the quadratic expression does not factor and must be solved using the quadratic formula.

where a = 1, b=3, and c=9

this cubic has two complex roots.

20%

step-by-step explanation: