# Simplify, multiplying and dividing rational expressions

**Question description**

State any restrictions on the variables

__4 – x__x² - 16

Simplify

__u² - 2u__u² - 4

Multiply. Assume that no denominator equals zero.

__7t³__times__3st__s 35

Multiply. Assume that no denominator equals zero.

__x² - 16__times__x + 3__x² + 3x x² - 4x

Divide. Assume that no denominator equals zero.

__6d²__divide by__c²d³__4c 18

Divide and simplify completely. Assume that no denominator equals zero.

__d² - 1__divide by__d-1__d² - d d

Divide and simplify completely

__8x – 8__times__x + 1__divide by__24__x² - 1 6x² - 12x x² - 4

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