Question

If x=y=z= -1, find x y z (x^3 + y^2 - z)

Answer 1

put -1 in place of x ,y and z and see what happens???

Answer 2

Well... do your substitutions!!
Keep in mind that anything to the power of an even number will give you a positive number.
For this problem, think of it this way:
x = -1
y = -1
z = -1

Answer 3

Oh ok

Answer 4

(-1)^3 + (-1)^2 - (-1)

Answer 5

that looks right?

Answer 6

ya ok also multiply -1, three time with this

Answer 7

ok is the answer 0?

Answer 8

no its -1x1 = 1

Answer 9

sorry -1

Answer 10

Oh ok, thank you

Answer 11

hhhmmm... I seem to have a different answer here. I've got -1 for an answer

Answer 12

(-1) (-1) (-1) ((-1)^3 + (-1)^2 - (-1))
This should give you a -1 for an answer