Question

If x+y=4. And xy=6. Find x²+y² *
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Answer 1

Step-by-step explanation:

Given,

x+y=4

xy=6

(x+y)²=x²+y²+2xy [using (a+b)²=a²+b²+2ab]

(x+y)²=x²+y²+2*6

(4)²=x²+y²+12

16=x²+y²+12

x²+y²=16-12

x²+y²=4

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