Posted by **jenna d** on Thursday, January 13, 2011 at 3:13pm.

factor it. 81r^2-36rs+4s^2

- math -
**helper**, Thursday, January 13, 2011 at 4:02pm
you try, see above example that I did for you.

you won't learn how to factor without trying

post back where you are stuck

- math -
**maya**, Thursday, January 13, 2011 at 4:20pm
i have no idea how to do this...

- math -
**helper**, Thursday, January 13, 2011 at 4:27pm
81r^2 - 36rs + 4s^2

this one is a little harder than the above one I did for you

(9r - 2s)(9r - 2s) = (9r - 2s)^2

this is factored form.

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