Question

Use binomial theorem to expand (d-3b)^3
a.d^3+3d^2b+3db^2+b^3
b.d^3-9d^2b+27db^2+27b^3
c.d^3-9d^2b+27db^2-27b^3
d.d^3-3d^2b+3db^2-b^3

Answer 1

have you tried NOT using the binomial theorem and just multiplying out\[(d-3b)^3=(d-3b)(d-3b)(d-3b)\]you will get the same answer.

Answer 2

would it be c.?

Answer 3

yes it would :)

Answer 4

Haha thanks bro. :)