Question

if x+y+z=9, xy+yz+zx=26 and xyz=24, find the value of x²(y+z) + y²(z+x) + z²(x+y)​

Answer 1

Answer:

63

Step-by-step explanation:

[x+y+z] ^2 =x ^2 +y ^2 +z ^2+2[xy+yz+zx]

9 ^2=x ^2+y ^2 +z ^2 +2(9)

∴x ^2 +y ^2 +z ^2

=63