Sign in

Sign up

Answered by **secretlyblu**

ok the best way to look at this is by factoring out so look at "r^4-16" if you factor out you get (r²-4)(r²+4) and the same with "r^4-81" if you factor out you get (r²-9)(r²+9) so now your problem looks something like this. now cancel out like terms remember because b/b=1so now your left with

Answered by **Gulhaider**

Well, even this expression given by 'secretlyblu' can be factorized:

Didn't find the right answer?

Use site search If you are not satisfied with the answer. Or browse Mathematics category to find out more.

Ask Your Question

Questions without answers