Question

Hard Question.....................................................

Answer 1

x+1 = 0  → x = -1

a(-1)^3 + 3(-1)^2 -13 = -a-10

5(-1)^3 -8(-1) +a = a+3
................................................

a+3 = -a-10 → 2a = -13 → a = -13/2 = -6.5

Answer 2

x+1=0 x = -1

a(-1)^3 + 3(-1)^2 -13 = -a-10

5(-1)^3 -8(-1) +a = a+3

a+3 = -a-10 ➜ 2a = -13 → a= -13/2 = -6.5

Hope it's helpful for you