Which of the following equations can be solved by the points of intersection P and Q of the curve and the line PQ?

a

x2 - 2 = 0

b

x2 - 4 = 0

c

x2 + 6 = 0

d

X2 - X – 2 = 0

e

x2 - x + 4 = 0

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b

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