### Home > PC3 > Chapter 5 > Lesson 5.2.2 > Problem5-70

5-70.

Rewrite each of the following expressions as a single fraction without negative exponents.

1. $\frac { 3 x ^ { - 3 } + 4 x } { 2 x - x ^ { - 2 } }$

Multiply by a GIANT ONE representing the highest power to eliminate.

$\left (\frac{3x^{-3}+4x}{2x-x^{-2}} \right ) \left(\frac{x^{3}}{x^{3}} \right )$

$\left (\frac{3+4x^{4}}{2x^{4}-x} \right )$

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

What GIANT ONE should you multiply this fraction by?

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

1. $\frac { x ^ { - 4 } y ^ { - 2 } + x ^ { - 3 } y ^ { - 1 } } { x ^ { - 1 } - x ^ { - 3 } }$

What GIANT ONE should you multiply this fraction by?

$\frac{x^{4}y^{2}}{x^{4}y^{2}}$