Is x2 − 1 a factor of P(x) = 2x4 + 7? If it is, write P(x) as a product of two factors. A. x2 − 1 is a factor. P(x) = (x2 − 1)(2x2 + 2)
B. x2 − 1 is a factor. P(x) = (x2 − 1)(2x2 − 2)
C. x2 − 1 is not a factor.
D. x2 − 1 is a factor. P(x) = (x2 − 1)(x + 9)

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Arefrigeration system at your company uses temperature sensors fixed to read celsius (°c) values, but the system operators in your control room understand only the fahrenheit scale. you have been asked to make a fahrenheit (°f) label for the high temperature alarm, which is set to ring whenever the system temperature rises above –10°c. what fahrenheit value should you write on the label?