Question

if x+y=4, xy=3then x²+y²=? ​

Answer 1

Answer:

aquaring bith sides

(x+y)² = x²+y²+2xy

(4)²= x²+y²+2×3

16=x²+y² +6

16-6= x²+y²

10= x²+y²

Step-by-step explanation:

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