Class: 9

1 )Factorise the following

a) 64x³ + 125 y³

b) 343 a³ + 512b³

c )216 p³ -- 729q³

d) 27m³ -- 8n³

2) without actual cubing calculate the following.

a,) (13)³+(-6)³+(-7)³

b)(14 )³+ (-8)³ +(-6)³

c,) (--15)³+ (7)³+(8)³