Question

हल करो( 7z+ 3y ) ×(7z-3y)​

Answer 1

Answer:

49z²-9y²

Step-by-step explanation:

( 7z+ 3y )(7z-3y)

=(7z)²-(3y)² by using identity((a+b)(a-b)=a²-b²)

=49z²-9y²

Answer 2

Answer:

(A+B)x(A-B) = (A^2-B^2)

(49z^2 - 9y^2)