Question

solve it
I have not remembering answer of this question​

Answer 1

Answer:

x + 2 = 0

x = -2

${x}^{3} + 2a {x}^{2} + ax - 1 \\ \\ {( - 2)}^{3} + 2a {( - 2)}^{2} + ( - 2) - 1 = 0$

$- 8 + 8a - 2 - 1 = 0 \\ \\ - 11 + 8a = 0$

$8a = 11 \\ \\ a = \frac{8}{11}$

May be your options are not correct!

Answer 2

Answer:

since x +2 is a factor

therefore

x+2=0

x = -2

Now putting the value ,we get: => (-2)^3 + 2a(-2)^2 + a(-2) -1 = 0

=> -8 + 8a - 2a - 1 = 0

=> 6a = 9

=> a = 3 by 2

hope it helps

plz mark it the brainliest