Diagonalize the matrix A, if possible. That is, find an invertible matrix P and a diagonal matrix D such that 
A = 
A.
P = 
, D = 
B.
P = 
, D = 
C.
P = 
, D = 
D.
P = 
, D = 
Answer: A
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A. Yes; A and C B. No C. Yes; G and D D. Yes; E and F
Evaluate the function requested. Write your answer as a fraction in lowest terms.
Find cos B.
A. cos B = 
B. cos B = 
C. cos B = 
D. cos B = 
Perform the indicated operations.( 7x2 + 5xy - 3y2 + 3) - ( 5x2 + 6xy + 5y2 - 9)
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