Exercise 2 Page 22

The first key phrase is "the difference between ... and ...". This indicates that we should subtract two things. ... - ...The two terms that are involved in the subtraction are: "the product of 4 and a number" and "the square of a number". 4 * a number-a number^2 The phrase "a number" is indicating an arbitrary number or a variable. If we call this number x, we can complete our expression. the difference between the product of 4 and a number and the square of a number 4 x - x^2 Note that this is only one of multiple ways to algebraically express the given verbal expression.