Question

Multiply and then evaluate :

(i) (4x + y) and (x – 2y); when x = 2 and y = 1.

(ii) (x² – y) and (xy – y²); when x = 1 and y = 2.

(iii) (x – 2y + z) and (x – 3z); when x = -2, y = -1 and z = 1.

Answer 1

(i) (4x + y) and (x – 2y)