17/15 - 4/5 please answer

5/15 or 1/3

Step-by-step explanation:

First, find a common denominator between the two fractions. 5 is the denominator of 4/5. 5 goes into 15, 3 times. So, multiple 4/5 by 3/3 and get 12/15. This puts the two fractions as fractions of 15. Now, subtract 12/15 from 17/15 and you get 5/15. If you simplify that by dividing by 5 on the numerator and denominator, you get 1/3. Hope this helps :)

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.