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Difficulty—
How many solutions does the equation \(0.25x^4 - 0.75x^2 -1 = 0\) have?
A) 0
B) 1
C) 2
D) 3
E) 4
Answer: C
Source: e-GMAT
A) 0
B) 1
C) 2
D) 3
E) 4
Answer: C
Source: e-GMAT
