Question

If x + y = 15 and xy = 17, find the value of x² + y²​

Answer 1

Step-by-step explanation:

x+y = 15

square in both sides

(x+y)^2 = (15) ^2

$(x + y) {}^{2} = \ {x}^{2} + {y}^{2} + 2xy$

x2+ y2+ 2xy= 225

x2+ y2+ 2× 17 = 225 (Xy =17 given)

x2+ y2+34 = 225

x2+ y2 = 225-34

x2+y2 = 191

hope it helps mark as brainliest