Factor completely.-82x2 + x4 + 81
A. (x + 1)(x - 1)(x + 9)(x - 9)
B. (x + 9)2(x - 1)2
C. (x + 1)2(x - 9)2
D. (x2 + 1)(x + 9)(x - 9)
Answer: A
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A. No x-intercepts, y-intercept: 
;
B. No x-intercepts, y-intercept: 
;
C. No x-intercepts, y-intercept: 
;
D. No x-intercepts, y-intercept: 
;
For the following functions, use linearization and the values of 
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