3/5 of the students in a class offer chemistry. if 21 of them offer chemistry, how many students are there in the class?

35

Step-by-step explanation:

3/5 × x = 21

3x/3 = 105/3

x=35

therefore, the total number of students in the class is 35

f(x) = x^3 -2x^2 -3x

x( x^2 -2x-3)

x( x^2 +x -3x -3)

x( x(x+1) -3(x+1))

x( x-3)( x+1)

so zeroes are 0, 3,-1

its (2) option

2

step-by-step explanation: