Question

here are 3 questions i also need help with

Answer 1

where?

Answer 2

here

Answer 3

(8x-2)/(x^2-1)=7x/(x^2-1)
8x-2=7x
x=2

(a-9)/(a+4)=(a^2-3)/(a+4)
a-a^2-6=0
this has solution only in complex no.s

(2a-1)=(a+7)/(a+1) cross multiply
2a^2+a-1-a-7=0
2a^2-8=0
a^2-4=0
(a-2)(a+2)=0
so a=2 or a=-2