Question

evaluate the following at x=-1,y=-2,z=0: (x+y+z)(x square+ y square+ z square- 2xy-2yz-2xz)​

Answer 1

Answer:

-9

Step-by-step explanation:

(x+y+z)(x^2+y^2+z^2-2xy-2yz-2xz)

=x^3+y^3+z^3

=(-1)^3+(-2)^3+(0)^3. [when, x=-1, y=-2,=0]

=-1-8+0

=-9