Question

Find the expansion of (3x+7y)(3x-7y) using suitable identity

Answer 1

Answer:

9x² - 49y²

Step-by-step explanation:

( 3x + 7y ) ( 3x - 7y )

Identity : -

( a + b ) ( a - b ) = a² - b²

Here,

a = 3x

b = 7y

( 3x + 7y ) ( 3x - 7y )

= ( 3x )² - ( 7y )²

= 9x² - 49y²

Answer 2

Step-by-step explanation:

here is ur answer

hope its correct

thank u