Question

If x-y=7 and xy=9, find the value of x^2+1/x^2

Answer 1

Answer:

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x−y=7

⇒(x−y)²=7²

⇒x²+y²−2xy=49

⇒x²+y²−2×9=49

⇒x²+y²−18=49

⇒x²+y²=49+18

⇒x²+y²=67

Answer 2

Answer:

[HeY Mate]

Solution

x−y=7

⇒(x−y)²=7²

⇒x²+y²−2xy=49

⇒x²+y²−2×9=49

⇒x²+y²−18=49

⇒x²+y²=49+18

⇒x²+y²=67

I Hope It Helps You✌️