On implicit differentiation problem.

Step-by-step explanation:

Concept : We have to differentiate the given equation twice and then put the values of x and y at the given point.

The given point is (2,-5).

Given    xy - y = -5

Differentiating both sides,

= 0

Substitute (x,y) as (2,-5)

= 0

Differentiating again, we get

Substitute values of x , y and \frac{dy}{dx} ,

probably .5

i can on others if necessary.

answer: 0

step-by-step explanation: the positive, like 5, + its opposite, like -5 would be 0

5+(-5)=0, or 5-5=0