Question

Решите с 1 по 4 ,пожалуйста

Answer 1

1)а)(3b-1)"=9b"-6b-1
б)(4m+5n)"=16m"+40mn+25n"
в)(13m-11n)(13m+11n)=169m"+143mn-143mn-121n"=169m"-121n"
2)a)r"'s""-r""s"'=r"'s"'(s-r)
б)3х-2х"+3у-2ху=х(3-2х)+у(3-2х)=(х+у)(3-2х)
3)3p+6g/p"+2pg=3(p+2g)/p(p+2g)=3/p