Q. The expression $\frac{x ^{2} - y ^{2}}{( x - y ) ^{2}} \cdot \frac{x ^{2} - x y + y ^{2}}{x ^{2} - 2 x y + y ^{2}} \div \frac{x ^{3} + y ^{3}}{( x - y ) ^{4}}$ simplifies to

72 142 Complex Numbers and Quadratic Equations Report Error

A

$\frac{1}{x y}$

B

$(x - y)$

C

$\frac{x ^{2} - x y + y ^{2}}{x ^{2} + 2 x y + y ^{2}}$

D

$(x + y)$

Solution:

Correct answer is (b) $(x - y)$