Answer:
Option D.
Step-by-step explanation:
The given expression is
[tex](-y^2-3y-5)-(-3y^2-7y+4)[/tex]
We need to find the simplified form of the given expression.
Using distributive property we get
[tex]-y^2-3y-5-(-3y^2)-(-7y)-(4)[/tex]
[tex]-y^2-3y-5+3y^2+7y-4[/tex]
On combining like terms we get
[tex](-y^2+3y^2)+(-3y+7y)+(-5-4)[/tex]
On further simplification we get
[tex]2y^2+4y-9[/tex]
Therefore, the correct option is D.
