Question

find the value of x + Y if X square + Y square = 19 and xy = 3​

Answer 1

Step-by-step explanation:

x²+y²= 19

(x+y²-2xy=19

(x+y)²-2×3=19

(x+y)²-6=19

(x+y)²=19+6

(x+y)²=25

x+y=5

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