Choose the correct options for the following questions.
What value of x is the solution of the polynomial $x^{3}-28x-48=0$
Difficulty: Easy
A:
4
B:
-4
C:
2
D:
-2
If (x+1) and (x-2) are factors of $x^{3}-Px^{2}+qx+2$, then P+q=
Difficulty: Easy
A:
-2
B:
1
C:
-1
D:
3
Which of the following is the factor of $x^{4}+x^{3}-21x^{2}+20$
Difficulty: Easy
A:
x+3
B:
x+2
C:
x-2
D:
x-5
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