Find the product.(x + 1)(x - 1)
A. x2 - 2x - 1
B. x2 - 1
C. x2 - 2
D. x2 + 2x - 1
Answer: B
Mathematics
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Let A and B be sets with cardinal numbers, n(A) = a and n(B) = b, respectively. Decide whether the statement is true or false.If B ? A, n(B) = n(A) - n(A - B).
A. True B. False
Mathematics
Evaluate the expression.rcot 270° + 8 cos 180° + 3 sec2 360°
A. 4 B. -8 C. 11 D. -5
Mathematics
Write as the sum and/or difference of logarithms. Express powers as factors.log5
A. 
log52x
B. log5
+ log5
C. 
log52 + 
log5x
D. log52 + 
log5x
Mathematics
Find all complex zeros of the polynomial function, and write the polynomial in completely factored form.f(x) = x3 + 3x2 + 6x + 4
A. f(x) = (x - 1)(x + 3 + 1i)(x + 3 - 1i)
B. f(x) = (x - 1)(x + 3 + 1i)(x - 3 - 1i)
C. f(x) = (x + 1)(x + 1 + i
)(x + 1 - i
)
D. f(x) = (x + 1)(x + 1 + i
)(x - 1 - i
)
Mathematics