B. -3
The value of a for given polynomial is -3
<h3>
Explanation:</h3>
<em>Factor theorem for polynomials,</em>
<u><em>If (x-c) is a factor of polynomial f(x), then f(c)=0</em></u>
Given: x+a is a factor of polynomial 
Let 
By Factor theorem, since x+a is a factor of f(x),
![(x+a)=[x-(-a)]\\So,\ f(-a)=0](https://tex.z-dn.net/?f=%28x%2Ba%29%3D%5Bx-%28-a%29%5D%5C%5CSo%2C%5C%20f%28-a%29%3D0)
Substituting 
in f(x)=0, we get
![f(x) = 4x^3-13x^2-ax = 0\\f(-a)= [4(-a)^3]-[13(-a)^2]-[a(-a)] = 0\\(-4a^3-13a^2+a^2)=0\\(-4a^3-12a^2)=0\\-4a^3=12a^2\\\frac{a^3}{a^2} =\frac{12}{-4} \\\\a=(-3)](https://tex.z-dn.net/?f=f%28x%29%20%3D%204x%5E3-13x%5E2-ax%20%3D%200%5C%5Cf%28-a%29%3D%20%5B4%28-a%29%5E3%5D-%5B13%28-a%29%5E2%5D-%5Ba%28-a%29%5D%20%3D%200%5C%5C%28-4a%5E3-13a%5E2%2Ba%5E2%29%3D0%5C%5C%28-4a%5E3-12a%5E2%29%3D0%5C%5C-4a%5E3%3D12a%5E2%5C%5C%5Cfrac%7Ba%5E3%7D%7Ba%5E2%7D%20%3D%5Cfrac%7B12%7D%7B-4%7D%20%5C%5C%5C%5Ca%3D%28-3%29)
Therefore, value of a is (-3)
Sōhei (僧兵, "monk soldiers", "warrior monks"[1]) were Buddhist warrior monks, The naginata is the weapon most often associated with them, though in legend as well as history many warrior monks are known to have been proficient with everything from bow and arrow to tantō and wakizashi (dagger and short sword). Many fought on horseback, and many with the ō-yoroi armor of the samurai. The sōhei were also trained to use the heavy kanabō, which was a large club forged of solid iron. Although deadly, this weapon was generally used to defeat an opponent without bloodshed.
The four South Asian countries that include territory in the Himalayan Mountain Range are:
India; the territory that includes the Himalayas is in the northernmost part of the country.
Pakistan; the territory that includes the Himalayas is in the northeastern part of the country.
Nepal; the country is lying on the Himalayas, and in here it is the highest peak of all, Mount Everest.
Bhutan; this small landlocked country, like Nepal, is totally lying on the Himalayas.
I think it’s true
I’m sorry if I get it wrong
