I don’t understand this can someone please help me?

possible answers are 2 or 3 (see below for explanation)

Step-by-step explanation:

The question is unclear as to what "doesn't belong" mean and hence can be interpreted in several ways:

There are 2 which i can see right off the bat without working out the numbers.

A) option 3 "doesn't  belong" because the variable is t whereas the others have variable "x"

B) option 2 "doesn't belong" because if you expand the expressions, option 2 is the only one with x³ as the highest power term. The other have x² (or t²) as the highest order term.

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.

26 is 33.33% of 78

step-by-step explanation:

26 is what percent of 78?

26 is p% of 78

equation: y = p% * x

solving our equation for p

p% = y/x

p% = 26/78

p = 0.3333

convert decimal to percent:

p% = 0.3333 * 100 = 33.33%