am i doing this right? could someone please help me?

Question

Reduce the rational expression to lowest terms. If it is already in lowest terms, enter the expression in the answer box. Also, specify any restrictions on the variable.

 

5r²-20/(5)

 

Rational expression in lowest terms: and i got (r-5)(r-4)/1

 

Variable restrictions for the original expression: r≠

 

i don't understand the last part though. could someone help

 

Answer 1

5r²-20/(5)

 

Jared, the first thing you need to do is start using

parenthesis to properly group your problems when

typing them in here.  This should rightly be:

 

(5r²-20)/5  which is not the same as what you input.

 

Factoring the numerator we can divide a 5 out of both terms:

 

(5r²-20)/5 = 5(r²-4)/5 = r²-4

 

This is the difference of two squares factoring to

 

(r-2)(r+2)

 

There are no restrictions on the variable r since the

problem does not have any variables in the denominator.