5questions

1. what is the third term in the binomial expansion (x-y^5)^3?
-3x^2y^5
-3xy^10
-9x^2y^2
-15xy^10

2. use pascals triangle to expand (3a - b)^4
a.
81a^4+12a^3b+18a^2b^2+12ab^3+b^4
b.
81a^4-12a^3b+18a^2b^2-12ab^3+b^4
c.
81a^4+108a^3b+54a^2b^2+12ab^3+b^4 d.
81a^4-108a^3b+54a^2b^2-12ab^3+b^4
3. use the binomial theorem to expand (t-w)^4
a.
t^4-6t^3w+8t^2w^2-6tw^3+w^4
b.
t^4-w^4
c.
t^4-4t^3w+6t^2w^2-4tw^3+24w^4
d.
t^4-4t^3w-12t^2w^2+24tw^3+24w^4

4. write 2r^3+8r^2-10r in factored form
a.
(2r-1)(r+5)
b.
2(r^3+4r^2-5r)
c.
2r(r^2+4r-5)
d.
2r(r-1)(r+5)

5. find the factored form of m^3-4m^2+6m-24
a.
(m+4)(m^2-6)
b.
m^2(m-4)+6m-24
c.
(m-4)(m^2+6)
d.
m(m^2-4m+6)-24