Factor completely.z4 - 5z2 + 4
A. (z - 1)(z + 1)(z - 2)(z + 2)
B. (z2 + 1)(z - 2)(z + 2)
C. (z - 1)(z + 1)(z2 + 4)
D. (z2 + 1)(z2 + 4)
Answer: A
You might also like to view...
Use the method of undetermined coefficients to solve the differential equation.3
- 13
+ 4y = xe-2x; 
= - 
and y = 
when x = 0
A. y = 
e4x - 
ex/3 - 
xe-2x + 
e-2x
B. y = 
e4x + 
ex/3 + 
xe-2x + 
e-2x
C. y = 
e4x - 
ex/3 + 
xe-2x + 
e-2x
D. y = 
e4x - 
ex/3 + 
xe-2x + 
e-2x
Write an equation to describe the relationship and solve the problem.y varies inversely as x. If y = 21 when x = 15, find y when x = 21.
A. y = 315x; 15
B. y = 
; 1
C. y = 
; 15
D. y = 15x; 315
Use the distributive property to remove parentheses.- 
(4y + 8x + 8z)
A. -10y - 20x + 20z B. -10y + 8x + 8z C. -10y + 20x - 20z D. -10y - 20x - 20z
Solve for n in the proportion. If possible, first simplify the known fraction.
= 
A. n = 6 B. n = 7 C. n = 3 D. n = 2