Question

13. Evaluate the expressions given below for a = - 4:
(i) a+8
(ii) 6a - 14
(iii) 7a2 + 7a - 20
answer only third one please please please please ​

Answer 1

Answer:

here it is

Step-by-step explanation:

1) a+8 = -4+8 = 4

2) 6a-14 = 6(-4) - 14 = -24 -14 = -38

3) 7a²+7a -20 = 7(-4)² + 7(-4) -20

= 7(16) -28 -20

= 112 - 48

= 64