Differentiate the equation and get the value of y' in terms of "x"
1)Find value of y'(-2) by putting x = -2
at x = -2 , y=?
the equation of tangent can be given by
this euation should satisfy the for the point (-2,?)
, you know the value of m [it is, y'(-2) ]
use this two facts to find "c"
Hence equation is with you