Factor the perfect square.x4 + 10x2 + 25
A. (x2 + 5)2
B. (x + 5)2
C. (x2 - 5)2
D. (x + 5)(x - 5)
Answer: A
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Find the required limit or indicate that it does not exist.
A. 
i - 8j
B. 
i + 8j
C. 
i - 2j
D. 
i + 8j
Find all the second order partial derivatives of the given function.f(x, y) = cos xy2
A. fxx(x, y) = y2 sin xy2; fyy(x, y) = 2[2y2 cos (xy2) - sin (xy2)] ; fyx(x, y) = fxy(x, y) = 2y[y2 cos (xy2) - sin (xy2)]
B. fxx(x, y) = -y4 cos xy2; fyy(x, y) = - 2x[2xy2 cos (xy2) + sin (xy2)]; fyx(x, y) = fxy(x, y) = - 2y[xy2 cos (xy2) + sin (xy2)];
C. fxx(x, y) = - y2 sin xy2; fyy(x, y) = 2[ sin (xy2)- 2y2 cos (xy2)] ; fyx(x, y) = fxy(x, y) = 2y [sin (xy2)-y2 cos (xy2)]
D. fxx(x, y) = - y2 sin xy2; fyy(x, y) = 2y
; fyx(x, y) = fxy(x, y) = 2
Provide an appropriate response.Which of the following numbers is a composite number?
A. 34 B. 53 C. 47 D. 61
Find fx(x, y).f(x, y) = 
A. 7x6
B. 
C. 
D. 