Question

x2 +y2 =19 and xy = 3 find x+y​

Answer 1

Answer:

x² + y² = 19 and xy = 3

and (x+y)² = x² + y² + 2xy

(x+y)² = 19 + 2 × 3

(x+y)² = 19 + 6

(x+y)² = 25

√(x+y)² = √25

x+y = 5

Answer 2

x²+y²=19 -- 1.

xy=3 ----2

[(x)²+(y)²+2xy=19

x²+y²+2 × 3=19[From 2]

x²+y² +6=19

(x+y)²=19 -6

(x+y)²=13

x+y =√13