Question

Which of the following is equal to (p + 2r)^3?

Answer 1

p^3 + 8r^3
p^3 + 8pr + 8r^3
p^3 + 3p^2r + 3pr^2 + r^3
p3 + 6p^2r + 12pr^2 + 8r^3

Answer 2

last one?

Answer 3

I was thinking the first one, coz if you square everything by 3

Answer 4

(a+b)^3=a^3+3a^2b+3ab^2+b^3

Answer 5

Wait! one more please you guys?



Which of the following is equal to (p + r)4?

p^4 + r^4
p^4 + 4p^2r^2 + r^4
p^4 + 4p^3r + 6p^2r^2 + 4pr^3 + r^4
p^4 + 2p^3r + 4p^2r^2 + 2pr^3 + r^4