Question

if x+y+z= 15 and xy + yz + zx = 71. Find x2 + y2 + z2​

Answer 1

Answer:

83

Step-by-step explanation:

x=3

y=5

Z=7

x+y+z= 15

3+5+7=15

xy + yz + zx = 71

3*5 + 5*7 + 7*3 = 71

15+35+21 = 71

x2 + y2 + z2=?

3²+5²+7²

9+25+49 = 83