Question

9. If xy = 6 and x + y = 5, then the value of x2 + y2 is​

Answer 1

Answer:

x=3 and y=2

Step-by-step explanation:

Because if xy = 6 then 3x2=6

if x+y=5 then 3+2=5

so the value of X2 + Y2 =

3x2=6 + 2x2=4 the answer is 6+4=10

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Answer 2

Answer:

13

Step-by-step explanation:

• On squaring both sides, we get
• (x+y)² = (5)²

By using the identity (a+b)² = a²+b²+2ab

• x²+y²+2xy = 25
• x²+y²+2×6 = 25
• x²+y²+12 = 25
• x²+y² = 25-12
• x²+y² = 13

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