Question

12. If x + 5y = 9 and xy = 4, find the value of (x2 + 25y2).​

Answer 1

Answer:

41

Step-by-step explanation:

sq both the sides in eqn.

x+5y = 9 , we get

x2 +25y2 + 10xy = 81

x2 +25y2 = 81-10(4). xy= 4 (from eqn. 2)

x2 +25y2 = 41

Answer 2

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