Solve the polynomial equation graphically or numerically. Round to the nearest hundredth if necessary.x4 - 10x2 + 21 = 0
A. -2.65, -2.13, 2.13, 2.65
B. -2.45, -1.73, 1.73, 2.35
C. -2.65, -1.73, 1.73, 2.65
D. 1.73, 2.65
Answer: C
Mathematics
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A. 
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