Rewrite the expression as a sum or difference, then simplify if possible.
?
?
A. ?
B. ?
C. ?
D. ?
E. ?
Answer: D
Mathematics
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Find the exact value of the product.cos 135° cos 45°
A. - 
B. 1
C. 
D. 2
Mathematics
Use the product rule to simplify the expression. Assume that the variables can be any real number.
A. 2ab 
B. 2ab 
C. - 2a2b 
D. 2 
Mathematics
Find the x- and y-intercepts of f.f(x) = (x - 4)2(x2 - 25)
A. x-intercepts: -4, -25; y-intercept: 100 B. x-intercepts: -5, 4, 5; y-intercept: 400 C. x-intercepts: -5, 4, 5; y-intercept: -400 D. x-intercepts: 4, 25; y-intercept: 100
Mathematics
Solve the equation.(x + 4)2 - 5 = 0
A. 1, 9
B. -4 ± 
C. 4 ± 
D. -2 ± 
Mathematics