Спростити вираз 16/х2-16 +4/х+4

А (2х2-9х+4)/(х2-16 )=(2x-1)(x-4)/[(x-4)(x+4)]=(2x-1)/(x+4)

2x²-9x+4=2(x-1/2)(x-4)=(2x-1)(x-4)

D=81-32=49

x1=(9-7)/4=1/2 U x2=(9+7)/4=4

Б)

(3х2+8х-3)/(х2+3х)=(3x-1)(x+3)/[x(x+3)]=(3x-1)/x

3x²+8x-3=3(x-1/3)(x+3)=(3x-1)(x+3)

D=64+36=100

x1=(-8-10)/6=-3 U x2=(-8+10)/6=1/3