Question

X+y=4 and x^2+y^2=7 then xy is

Answer 1

Answer:

Step-by-step explanation:

(x + y)^2 = 4^2

x^2 + y^2 + 2xy = 16

     7      + 2 x y  = 19

                2 x y  = 19 - 7

                2 x y  =  12

                   x y = 12 / 6

so, answer  for xy = 2