(1 x +1 y ) (1 x -1 y )=? - Vidyadip

MCQ

$\left(\frac{1}{x}+\frac{1}{y}\right)\left(\frac{1}{x}-\frac{1}{y}\right)=?$

✓
$\left(\frac{1}{x^2}-\frac{1}{y^2}\right)$
B
$\left(\frac{1}{x^2}+\frac{1}{y^2}\right)$
C
$\left(\frac{1}{x^2}+\frac{1}{y^2}-\frac{1}{x y}\right)$
D
$\left(\frac{1}{x^2}-\frac{1}{y^2}+\frac{1}{x y}\right)$

✓

Answer

Correct option: A.

$\left(\frac{1}{x^2}-\frac{1}{y^2}\right)$

A

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