Question

Expand the following: (3x-1/x)³​

Answer 1

Answer:

Step-by-step explanation:

$(a-b)^{3} =a^{3} -b^{3} -3ab(a-b)$

$(3x-\frac{1}{x}) ^{3}=(3x)^{3} -(\frac{1}{x} )^{3}-3*3x*\frac{1}{x}(3x-\frac{1}{x} )$