1
1)(b+2)/(b-1)²*3(b-1)/[(b-2)(b+2)]=3/[(b-1)(b-2)]
2)3/[(b-1)(b-2)]-3/(b-2)=(3-3b+3)/[(b-1)(b-2)]=-3(b-2)/[(b-1)(b-2)]=3/(1-b)
2
1)1/(a-2)²+2/[(a-2)(a+2)+1/(a+2)²=(a²+4a+4+2a²-8+a²-4a+4)/(a²-4)²=
=4a²/(a²-4)²
2)4a²/(a²-4)*(a²-4)²/2a=2a
Корень,а под ним 3а
вроде так)
<span>3a+3b= 3(a+b)
m^2-m^4=m^2(1-m^2) = m^2(1-m)(1+m)
2x^2-8x^5=2x^2(1-4x^3)
81-18p+p^2=(p-9)^2=(p-9)(p-9)</span>