Question

(3x/5 + 7y/3)(3x/5 - 7y/3)​

Answer 1

Answer:

USE THE IDENTITY (a+b)(a-b) = a^2 - b^2...

(3x/5)^2 - (7y/3)^2

9x^2/25 - 49y^2/9...

Answer 2

Step-by-step explanation:

$Use \: \: the \: \: identity : \\ (a + b)(a - b) = {a}^{2} - {b}^{2} \\ \\ ( \frac{3x}{5} + \frac{7y}{3} )( \frac{3x}{5} - \frac{7y}{3} ) \\ = {( \frac{3x}{5}) }^{2} - { (\frac{7y}{3}) }^{2} \\ \large{ \boxed{ = \underline{ \underline{ \frac{9 {x}^{2} }{25} - \frac{49 {y}^{2} }{9} }}}}$