Question

упростите выражение:​

Answer 1

в). ((4х^2-9)/(1-6х^+9х^2))/((2х-3)/(3х-1))+((4-х)/(1-3х))=(((2х-3)(2х+3))/(3х-1)^2)*((3х-1)/(2х-3))+((4-х)/(1-3х))=((2+3х)/(3х-1))+((4-х)/(1-3х))=(-2-3х+4-х)/(3х-1)=(2-4х)/(3х-1)

г). =((2b-b^2+5+b^2)/(2-b))*((4-4b+b^2)/(2b+5))=((2b+5)/(2-b))*((b-2)^2/(2b+5))=((2b+5)/-(b-2))*((b-2)^2/(2b+5))=-(b-2)=-b+2