What section of a textbook states the authors purpose for writing the book

Consider the quadratic equation ax^2+bx+5=0,where a, b and c are rational numbers and the quadratic has two distinct zeros.if one zero is irrational what is the other zero?

Read the following passage: sari couldn't believe her bad luck. she had locked her keys in the car. to add fuel to the fire, her cell phone was in the locked car, and she was late for a very important meeting. she knocked on her neighbor's door so that she could ask to use his phone, but he was not not home. what was she to do? what role does the idiom in the passage serve? a. it shows that sari has incredibly bad luck when it comes to work.b. it shows that sari's neighbor was not home either.c. it shows that sari locked her keys in the car.d. it shows that sari's situation was worse than it seemed at first.

How do to my dear loving husband and to the kings most excellent majesty's reflect cultural values of their time