Question

if alpha and beta are zeros of 3x²-5x-2x then find alpha ³+beta³​

Answer 1

Answer:

alpha + beta =5/3

alpha×beta =-2/3

alpha^3+beta^3= (alpha+beta)^3-3alpha×beta(alpha+beta)

=(5/3)^3-3×(-2/3)(5/3)

=(5/3)+30/9

=125/27 + 10/3

=(125+90)/27

=215/27 Ans