Question

expand (3x-1/2x)^3. ​

Answer 1

27x^3+1/x^3+27x+9/x

step by step:

formula used:-. (a+b)^3=a^3+b^3+3ab(a+b)

Here.

=>. (3x + 1/X )^3

=>. (3x)^3+(1/X)^3 +3(3x*1/X) (3x +1/X)

=>. 27x^3+1/x^3(3*1)(3x+1/x)

=>. 27x^3+1/x^3+9(3x+1/X)

=>. 27x^3+1/x^3+27x +9/X

.°. (3x-1/2x)^3= 27x^3+1/x^3+27x+9/X.

hope it helps you ☺️