Write the complete binomial expansion.(3x2 - y)5
A. 243x10 - 405x6y + 270x6y2 - 90x4y3 + 15x2y4 - y5
B. -243x10 + 405x6y - 270x6y2 + 90x4y3 - 15x2y4 + y5
C. 243x10 + 405x8y + 270x6y2 + 90x4y3 + 15x2y4 + y5
D. 243x10 - 405x6y - 270x6y2 - 90x4y3 - 15x2y4 - y5
Answer: A
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A. Focus: 
; directrix: y = 1
B. Focus: 
; directrix: y = 
C. Focus: 
; directrix: x = 1
D. Focus: (-7, 2); directrix: y = 0
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Divide.19.2 ÷ (-2.4)
A. -8 B. 0.8 C. -0.8 D. 8
Find the asymptotes of the hyperbola.64y2 - 16x2 = 1024
A. y = 
x and y = - 
x
B. y = 
x and y = - 
x
C. y = 4x and y = - 4x
D. y = 2x and y = - 2x