Question

factorize using identities:-
( i ) 9(x+y)^2 -x^2
( ii ) 1 - (b - c)^2
PLZZ answer it friendss only if you knoww

Answer 1

Answer:

Step-by-step explanation:

(i) 9(x+y)²-x²

9(x+y)(x+y)-x²

9(x²+xy+xy+y²)-x²

9(x²+2xy+y²)-x²

9x²+18xy+9y²-x²

=8x²+18xy+9y²

(ii) 1-(b-c)²

1-(b-c)(b-c)

1-b²-bc-bc+c²

= 1-b²-2bc+c²