4. a) vic wrote the polynomial xa + xb + 2a - 25
and factored it as xla + b) + 2(0-b). can this
expression be factored further? explain.
b) lyn wrote the polynomial xa + xb - 2a - 25
factor lyn's polynomial.

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