Use exact numbers. + 8+ 6 5+ 3 3 2- 1+ -9-8-7-6-5 -4 3-2 i 1 2 3 4 5 6 7 8 9 -2+ -3+ -5+ -6 7 .​

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.