Question

SECTION -C (EACH CARRY THREE MARKS) [9] @) solve by graphical method :( x + 2) (y -1 ) = xy , (x-1) (y +1) = xy​

Answer 1

(x+2)*(y-1)= xy -x +2y-2

xy -x +2y -2 = xy (cancel xy from lhs and rhs)

2y-2-x=0 ----(1)

similarly:-

x -y -1=0 ------(2)

adding equations (1) and(2) we get

y-3=0

y=3

and x=4