Question

13. Evaluate the expressions given below for a = -4:
(i) a +8
(ii) 6a - 14
(iii) 7a² + 7a - 20
(iv) a + 2a - a + 5​

Answer 1

Step-by-step explanation:

I) a+8 = -4+8=4

ii) 6a-14=6×(-4)-14=-24-14

=-38

iii) 7(-4²)+7(-4)-20

7×16-28-20= 112-48=64

iv) (-4)+ 2(-4)-(-4)+5

= -4-8+4+5

=-12+9

=-3