4/2a-1+3-2a/1-2a; x^2/x-3+9/3-x

Question

4/2a-1+3-2a/1-2a; x^2/x-3+9/3-x

Answer 1

1) 4/2a-1+3-2a/1-2a=0
4/2a-1-3-2a/2a-1=04-3-2a=0
-2a=-1
a=1/2
2) x²/x-3+9/3-x
  x²/x-3-9/x-3
x²-9=0
x=+-3