Question

Simplify and find the value for :

1) x = -1, y = 1 and z = 2




i) (2x + y) + 3y (y - z) – 2x (x – y)

Answer 1

Step-by-step explanation:

=[{2×(-1)+1}+3×1(1-2)-2×(-1)(-1-1)]

=-2+1+3-1+2+1

=7-3

4