divide 21a3 - 14a by 7
\(\frac{21a^3-14a}{7}\) = 3a³ - 2a "or" a(3a²-2)
the answer is 3a3-2aso 21a3-14a, lets see, we can factor it by 7 so,21a3-14a = 7(3a3-2a)so, if you divide 7(3a3-2a) by 7, the sevens cancel out and the answer equals 3a^3-2a
