Question

if x=1 ,y=2 and z=3, find the value of x × x+y× y +2xyz

Answer 1

1*1+2*2+2*1*2*3

1+4+12

17

Answer 2

x*x+y*y+ 2xyz
1*1+2*2 + 2*1*2*3
5 + 12
17 (ans)