Please help me. In rational expressions, how do we express the following:
1. 729p^3-1

2. 1- 2/x / 1+ 2/x

Thanks for the help.

Question

Please help me. In rational expressions, how do we express the following:
1.  729p^3-1

2.  1-  2/x   /  1+ 2/x

Thanks for the help.

pooja195 · Answer

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pooja195 · Answer

do u know where to star?

pooja195 · Answer

*start

anonymous · Answer

I am not sure. My teacher did not give a clear formula. @pooja195

pooja195 · Answer

im not sure about this one im sorry @TuringTest  ?

turingtest · Answer

in rational expressions you need to write both the numerator and the denominator
what is the denominator of 729p^3-1   ?

anonymous · Answer

It has no denominator. @TuringTest

turingtest · Answer

all rational expressions have a denominator, but if that denominator is 1 you don't have to write it, since multiplying and dividing by 1 do not change the original expression

anonymous · Answer

I tried to work on it but I really don't know how to start. Can you give me some guidelines on how to solve it? @TuringTest .

turingtest · Answer

a "rational expression" is an expression with the denominator written out
notice that $\frac a1=a$, which means that $a=\frac a1$
writing $a$ as a rational expression is writing it instead as $\frac a1$

turingtest · Answer

write your expression with the denominator specified
from what I said above you should be able to guess what the denominator of 729p^3-1 is

anonymous · Answer

Okay, thanks @TuringTest I will try to answer this. Thank you so much!

turingtest · Answer

you are welcome!