Question

- 16-12-8 +7
-23-20
- 3
3. Find the value of the following
expressions, when x=-1:
(1) 2x-7 (ii)-** 2
() x2 + 2x + 1 (iv) 2x -x-2
Solution :
( 1 ) 2x - 7​

Answer 1

2*1-7

=-5

II) 2

III) 1*2+2*1+1

=2+2+1

=5

Iv) 2*1-1-2

=2-1-2

=-3