The general pattern shown uses 2 variables.
They are a and b. To write a special ase fo the genreral pattern: + Replace the variable a with any number + Replace the variable b with any number Notice that in the third special case, the variables a and b have been replaced by the same number. |
General Pattern
a * (b - 1) = a * b - a Special Case 5 * (4 - 1) = 5 * 4 - 5 72 * (13 -1) = 72 * 13 - 72 6 * (6 - 1) = 6 * 6 - 6 |