Question

$x = y = 9 \: and \: xy = 16 \: find \: value \: of \: (x + y$

Answer 1

so 
(x+y)^2=x^2+y^2+2xy
putt the given value 
(x+y)^2=9^2+9^2+2*16
(x+y)^2=81+81+32
(x+y)^2=194
x+y=√194





i hope this will help u 
by DEVANSH