Question

I need the answer of question b) here

Answer 1

x²+x-2=0
x²+2x-x-2=0
x(x+2)-1(x+2)=0
(x-1)(x+2)=0
x=1,x=-2
ă=1,b=-2
1/à-1/b=1/1-(-1/2)=1+1/2=3/2