Question

(C) x2 + y2 – Z2 – 3xyz if x =1, y=-1, z = 2​

Answer 1

Step-by-step explanation:

2*1+2*(-1)-2*2-3*1*(-1)*2= 2

Answer 2

Answer:

4

Step-by-step explanation:

x^2+y^2-z^2-3xyz

(1)^2+(-1)^2-2^2-3×1×(-1)×2

=1+1-4+6

=2-4+6

=-2+6

=4