Question

If x+y=9 and xy=5, find x2+y2 *
O
81
O
71
O 61
O
91​

Answer 1

Answer:

Hope it helps!! Mark this answer as brainliest if u found it useful and follow me for quick and accurate answers...

Step-by-step explanation:

Using identity

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

So,

${(9)}^{2} = x {}^{2} + 2(5) + y {}^{2} \\ \\ 81 = 10 + {x}^{2} + {y}^{2} \\ \\ 81 - 10 = {x }^{2} + {y}^{2} \\ \\ 71 = {x}^{2} + {y}^{2}$

Answer 2

Answer:

${x }^{2} + {y}^{2} = 71$

hope it helps you!!!