Question

Factorise 81a2 -36b2
wwwwwwww
(81a +36b) (81a-36b)
o (9a +6b) (9a -6b)
O
ab(9a+6b)
0
9a(9a -6b)

Answer 1

Answer:

(9a +6b)(9a -6b)

Step-by-step explanation:

its simple formula of a^2 -b^2