1)10/(x-4)+ 4/(x-10)=2 /.(x-4)(x-10)
10(x-10)+4(x-4)=2.(x-4)(x-10)
10x-100+4x-16=2xˇ2-28x+80
14x-116=2xˇ2-28x+80
2xˇ2-42x+196=0
xˇ2-21x+98=0 , D=441-392=49, V(D)=V(49)=7
x1=(21+7)/2=14
x2=(21-7)/2=7
2)x-12/x=4 /.x
xˇ2-12=4x,xˇ2-4x-12=0, D=16+48=64,V(D)=V(64)=8
x1=(4+8)/2=6
x2=(4-8)/2=-2
3)(xˇ2-x-2)/(x-3)=0, xˇ2-x-2=0,(x-2)(x+1)=0
a)x-2=0, x1=2
b)x+1=0,x2=-1