Question

Evaluate the expression when x=-1 and y= -8 z=1/4
xyz

Answer 1

Substitute the values of x, y and z to the expression:

`x=-1,\ y=-8,\ z=(1)/(4)\\\\xyz=(-1)(-8)\left((1)/(4)\right)=(8)\left((1)/(4)\right)=(8)/(4)=2`