Question: Theorem: For any real number x , x 2 - 4 v v x v v + 1 6 0 In a proof by cases

Theorem: For any real number x,x2-4vvxvv+160
In a proof by cases of the theorem, there are three cases. The first case is that x4.
The second case is that x-4. What is the third case?
a.x4-4>ix>4-4
d.-4>ix>4-4
b.x4
c.-4
d.-4>ix>4
Theorem: For any real number x,x2-4vvxvv+160 In a proof by cases

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