Question

(a+2b)³
(x-3y)³
(2m-3n)³

Answer 1

$(a+2b)^{3} =a^{3} +6a^{2}b+12ab^{2} +8b^{3}$
$(x-3y)^{3}=x^{3} -9x^{2}y+27xy^{2} -27y^{3}$
$(2m-3n)^{3} =8m^{3}-36m^{2}n+54mn^{2}-27n^{3}$