Question

Subtract and simplify.

Answer 1

It is the last option the
4y^2-10y-1

Answer 2

$(y^2-7y-5)-(-3y^2+3y-4)$
$=y^2-7y-5+3y^2-3y+4$
$=3y^2+y^2-7y-3y-5+4$
$=4y^2-10y-1$

In short, the answer would be $4y^2-10y-1$ (Option D).

Hope this helps !

Photon