CPM Homework Help : PC3 Problem 12-62

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Home > PC3 > Chapter Ch12 > Lesson 12.1.4 > Problem 12-62

12-62.

Rewrite each of the following expressions as a single, simplified fraction.

$xy^{−1} − yx^{−1}$
Hint (a):
Multiply the expression by a Giant One with $xy$ in both the numerator and denominator.

$(x^{−1} − x)(x^{−1} + x)$
Step (b):
$x^{-2}+x^0-x^0-x^2$

$\frac { y ^ { - 2 } - 1 } { y ^ { - 2 } }$
Hint (c):
Multiply the expression by a Giant One with $y^{2}$ in both the numerator and denominator.

$\frac { 1 } { x - y } + \frac { 1 } { x + y }$
Step (d):
$\frac{x+y}{(x-y)(x+y)}+\frac{x-y}{(x-y)(x+y)}$

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