Round 38,137 to the nearest thousand

In the polynomial below, what number should replace the question mark to produce a difference of squares? x2 + ? x - 36

Type the correct answer in each box. spell all the words correctly, and use numerals instead of words for numbers. if necessary, use / for the fraction bar(s).

What is the distance between a and b? round your answer to the nearest tenth. a coordinate plane is shown. point a is located at negative 1, 5, and point b is located at 4, 1. a line segment connects the two points.