Question

please give ans of que.4
I will mark u brainnlist.

Answer 1

8(-1/2)^3-a(-1/2)^2- (-1/2)+2=0

8(-1/8) - a (1/4) + 1/2 + 2 = 0

-8 -a/4 + 1/2 + 2 = 0

(-32 -a + 2 + 4)/4 = 0

-32 -a +2 +4 = 0

-32 -a +6 = 0

-26 -a = 0

-a = 26

therefore , a= -26