Question

if x2+y2=9 and xy=8,then find the value of x+y

Answer 1

Answer:5

Step-by-step explanation:We know (x+y)^2= x^2 + y^2 + 2xy

x^2 + y^2=9,xy=8

Putting values,

(x+y)^2= 9+ 2 x 8

(x+y)^2 = 9 + 16

(x+y)^2 =25

(x+y)= √25=5