Question

expand using identity (3x+5/x)^3​

Answer 1

Answer:

Step-by-step explanation:(3x+5/x)^3=(3^3*x^3)+(3*3^2*x^2*5/x)+3*3x*(5^2/x^2)+(5^3/x^3)=27x^3+135x+45/x+(125/x^3)

Answer 2

$( {3x + \frac{5}{x} })^{3} \\ \\ = ( {3x})^{3} + 3.( {3x})^{2} . \frac{5}{x} + 3.3x.( { \frac{5}{x} })^{2} + ( { \frac{5}{x} })^{3} \\ \\ = 27 {x}^{3} + 3.9 {x}^{2} . \frac{5}{x} + 9x. \frac{25}{ {x}^{2} } + \frac{125}{ {x}^{3} } \\ \\ = 27 {x}^{3} + 135x + \frac{225}{x} + \frac{125}{ {x}^{3} }$