Undefined Expressions

An expression is undefined any time the denominator is equal to 0. 

 Skill Check 1

 Skill Check 2

  


Combining like terms

Add or subtract the coefficients of terms that have the same variable. Remember the sign stays with the number that comes after it.

 

Check your answer.

Check your answer.

 


Distributive Property

Multiply the expression outside the parentheses times every term inside the parentheses. Watch for the minus sign.  This is one of the most common sign errors!

 

Check your answer.

Check your answer.


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