Question

 b) 2y-(4y^2)//(2y-1)-1

Answer 1

$2y- frac{4y^2}{2y-1}-1= frac{2y(2y-1)-4y^2-2y+1}{2y-1}= frac{4y^2-2y-4y^2-2y+1}{2y-1}= frac{-4y+1}{2y-1}$