#### Factorisation of r2 – 4xy + 4y2 is

(a) (x+2y) (x-2y)

(b) (x+2y) (x+2y)

(c) (x-2y) (x-2y)

(d) (2x-y)(2x+y)

**Answer : **

**(c) (x-2y) (x-2y) **

#### Which of the following is a factor of (x + y)³ – (x³+ y³)?

(a) x²+xy +2xy

(b) x² + y² – xy

(c) xy²

(d) 3xy

**Answer : **

**(d) 3xy**

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