a) x+2/2x+4=0
x+2/2(x+2)=0
1/2=0
1=0
b) x-11/3x-33=0
x-11/3(x-11)=0
1/3=0
c) x-14/x^2-196=0
x-14/(x-14)(x+14)=0
1//x+14=-
