Question

By using standard formula. Expand this ( 3x - 1/2x ) ^2 ​

Answer 1

$( {3x - \frac{1}{2x}) }^{2}$

$( {3x)}^{2} + ( { \frac{1}{2x}) }^{2} - 2 \times 3x \times \frac{1}{2x}$

$9 {x}^{2} + \frac{1}{4 {x}^{2} } - \frac{3x}{2x}$

Answer 2

Answer:

Using identity (x-y)^2 = x^2+y^2-2×x×y