Ответы и объяснения

2013-10-29T20:39:07+04:00
(х-1)(х+1)•5•(х+2) 5(х-1) 5х-5
_________________=___________=________
(х-2)(х+2)(х+1) (х-2) х-2
2013-10-29T20:39:27+04:00
1)(X^2-1)/(x^2-4) * 5(x+2)/(x+1)= (x+1)(x-1)/(x-2)(x+2) * 5(x+2)/(x+1)= 5(x+1)/(x-2)
2)(2x^2+3x+2)/3(2x^2+3x+2)=1/3