Choose the correct options for the following questions.
Which of the following is a factor of $P(x)=2x^{3}+3x^{2}-3x?
Difficulty: Easy
A:
x+1
B:
2x+1
C:
3x+1
D:
2x-1
The minimum value of the quadratic function $f(x)=2x^{2}-4x+7$ is
Difficulty: Easy
A:
3
B:
5
C:
-3
D:
-5
The maximum value of the quadratic function $f(x)=-2x^{2}-20x$ is
Difficulty: Easy
A:
4
B:
3
C:
5
D:
7
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