Question

2. If a= -2, find the values of the following polynomials.
(1) 2a +4
(i) 7-3a
(iii) a2 +1
(iv) 4-a2
(With process)​

Answer 1

Step-by-step explanation:

(I)2a+4

=2(-2)+4

=-4+4

=0

(ii)7-3a

=7-3(-2)

=7+6

=13

(iii)a²+1

=(-2)²+1

=4+1

=5

(iv)4-a²

=4-(-2)²

=4-4

=0

Answer 2

Answer:

1.= 0

2. = 13

3.= -3

4.= 8

Step-by-step explanation:

1. 2a + 4

= 2×-2 + 4

= -4+4

= 0

2. 7-3a

= 7- 3×-2

= 7 + 6

= 13

3. a2+1

= -2×2+1

= -4+1

= -3

4. 4-a2

= 4+2×2

= 4+4

= 8