Ответы и объяснения

2013-04-07T13:10:03+04:00

(x-4)/(x-5)+(x-6)/(x+5)=2
 (x-4)(x+5)+(x-6)(x-5)=2x^2-50
 x^2+5x-4x-20+ x^2-5-6x+30=2x^2-50
 2x^2-10x+10=2x^2-50
    -10x=-60 
        x=6

 (7y-3)/(y(1-y))=1/(y-1)-5/(y(y-1))
-(7y-3)/(y(y-1))=1/(y-1)-5/(y(y-1))
-7y+3=y-5
-8y=-8
 y=1

(x+3)/(x-3)+(x-3)/(x+3)=10/3
3(x+3)^2 +3(x-3)^2=10x^2-90
3(2x^2+8)=10x^2-90
 6x^2+18=10x^2-90
4x^2=108
x^2=27
x=-3V3 ,x=3V3 
v-корень