Respuesta :

x2+16 is the prime polynomial.
x2+16 is the only 
polynomial that couldn't be factored out anymore

x2-36 --> (x-6)(x+6)
x2-7x+12 --> (x-3)(x-4)
x2-x-20 --> (x+5)(x-4)

Answer:

x^2+16

Step-by-step explanation: