Question

15. If x2 + y2 = 13 and xy = 6, find the value of: x+y​

Answer 1

Answer:

x+y = 5

Step-by-step explanation:

(x+y)² = x²+y²+2xy

(x+y)² = 13+2(6)

(x+y)² = 13+12

(x+y)² = 25

(x+y) = √25

x+y = 5