Question

critical points:

-5y^2+6x-1=0
10y^2-10xy=0

Answer 1

x= 1/5 y = .2
x = 1 y = 1

Answer 2

how did you come on these values? could you please explain your steps?

Answer 3

Differentiate both equations and equate them to 0you get
-10y+6=0 and 20y-10y-10x=0 i.e., x=y and y=6/10=3/5
hence x=y=3/5 are the critical points.

Answer 4

you know the basics of differentiation right?

Answer 5

ofcourse i know the basics of differentiation.. but i havent done this... with the substitution