Kevin, michael and darren all do their own laundry at home. kevin does his laundry every 9 days, michael every 10 days, and darren every 12 days. if they all did their laundry today, in how many days will the three of them all do their laundry again on the same day

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.

c

-by-step explanation:

it would be c