You have to choose the "base" number {{MATH_12}}, so that {{MATH_13}} is near {{MATH_14}}, and so that you can easily and exactly compute the values {{MATH_15}} and {{MATH_16}}. These two values are needed when we compute the expression for {{MATH_17}}. Can you think of a number that is near {{MATH_18}} that you can calculate the square root of? {{CMD_19}} {{CMD_20}} The best choice for {{MATH_21}} is {{MATH_22}}. Any other number for which it is easy to compute {{MATH_23}} is farther away from {{MATH_24}}. Now we have to compute {{MATH_25}} and {{MATH_26}}. {{CMD_27}} {{MATH_28}} {{CMD_29}} {{CMD_30}} {{MATH_31}} {{CMD_32}} {{CMD_33}} {{MATH_34}} {{CMD_35}} {{CMD_36}} {{CMD_37}}