Solve for x.
(Will be marked the brainliest for sure)

15

Step-by-step explanation: if you look at 8 compared to its counterpart of 24 youll see the ratio is 1:3 and so you just multiply 5 by 3 tp get 15

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.

77

step-by-step explanation: