Multiply mentally.(x - 9x3)2
A. x2 - 18x3 + 81x6
B. x - 18x2 + 81x6
C. x2 - 18x4 + 81x6
D. x2 - 18x6 + 81x9
Answer: C
Mathematics
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A. -24x10 + 5x4 B. -4x5 C. -4x10 - 4x9 D. -24x10 + 20x9
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Mathematics
Solve the equation in the complex number system.8x2 + 1 = 3x
A. 
B. 
C. 
D. 
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