Question

plz answer my this question ​

Answer 1

Step-by-step explanation:

x²+y²+z²=83

x+y+z=15

Now,

(x+y+z)² = x²+y²+z²+2(xy+yz+xz)

(15)²=83 + 2(xy+yz+xz)

xy+yz+xz = (225-83)/2 = 71

Now,

x³+y³+z³-3xyz = (x+y+z)(x²+y²+z² -(xy+yz+xz))

= (15)(83-71)

= 15×12 = 180