HELP kinda struggling

Find the roots of the polynomial function f(x) = x^3 + 2x^2 + x

Which fraction is equal to 1hole and 2/5? a.3/5 b.75 c.57 d.73

If you invest 1,500 today in a bank that gives you a 5 percent annual interest rate, which of these items can you buy in two years? a. electronics worth $1,650 b.fitness equipment worth $1,700 c.a holiday package worth $2,000