Question

7. Evaluate the following after simplification:
(i) 5x (3x – 4y + 2z) for x = 1, y=-1,z= 2
(ii) 3pq (p2-2q + r) for p=-1,q=2, r=3
(iii) 4mn (m-2n+p) for m=1, n=-2, p=3
(iv) (7x-xº) x (2x + - x') for x = 2
3
7​

Answer 1

55

Step-by-step explanation:

-15 (1)2-20(1)(-1)+10(1)(2)

=15+20+20

ans=55