if (x-1) and (x+2) are two factors of the polynomial 2x^3 + mx^2 -x-n, then find the vaue of (m^2-n^2)

if (x-1) and (x+2) are two factors of the polynomial 2x^3 + mx^2 -x-n,

1.	if (x-1) and (x+2) are two factors of the polynomial 2x^3 + mx^2 -x-n, then find the vaue of (m^2-n^2)
Answer» if (x-1) and (x+2) are two factors of the polynomial 2x^3 + mx^2 -x-n, then find the vaue of (m^2-n^2)