Question

Factorise:-
49 x^2 - 9 y^2*​

Answer 1

Answer:

49y² - 9y²

= (7y)² - (3y)²

= a² - b² = (a+b)(a-b)

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

(10y)(4y)

40y

Answer 2

Answer:

49x²-9y²

=a²-b² = (a+b)(a-b)

= (7x)²-(3y)²

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