Complete the identity.cos4 x - sin4 x = ?
A. 1 + 2sin2 x
B. 1 - 2cos2 x
C. 1 + 2cos2 x
D. 1 - 2sin2 x
Answer: D
Mathematics
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Find the value of 4xy2 if x = 6 and y = 8.
a. 32 b. 128 c. 512 d. 1,536 e. 9,216
Mathematics
Solve.-4n = -28
A. -7 B. 24 C. 7 D. -24
Mathematics
Solve the system of nonlinear equations using the method of elimination.
A. (4, 1), (4, -3), (3, 1 + 
), (3, 1 - 
)
B. (4, 1), (4, -3), (3, -1 + 
), (3, -1 - 
)
C. (4, -1), (4, 3), (3, 1 + 
), (3, 1 - 
)
D. (4, 1), (4, -3), (-3, 1 + 
), (-3, 1 - 
)
Mathematics
Rewrite the expression without using negative exponents. (Assume all variables represent nonzero real numbers.)
A. 4x
B. 
C. x-4
D. x4
Mathematics