R=s+2t make 's' the subject of the equation​

the answer is s = r - 2t

Step-by-step explanation:

putting the r on the right side you have to subtract it. then putting the s on the left side you have to subtract as well. then to get rid of the negative you switch every sign in the equasion.

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