Question

6. If x = 4, y = 3 and z =-2, find the value of :
(i) x – 2y + 3z
(ii) xy + yz + zx
(iii) -2xyz​

Answer 1

1) x - 2y + 3z

4 - 2*3 + 3*(-2)

4 - 6 - 6

-8

2)xy + yz + zx

4*3 + 3*(-2) + (-2)4

12 - 6 - 8

-2

3)-2xyz

(-2)*4*3*(-2)

48