Question

If x+y=5 , xy=4 find x^2+y^2

Answer 1

Answer:

=> (x + y)2 = x2 + y2 + 2.x.y

=> (5)2 = x2 + y2 + 2 * 4

=> 25 = x2 + y2 + 8

=> 25 - 8 = x2 + y2

=> x2 + y2 = 17

Step-by-step explanation:

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