These are the basic rules for multiplication in negatives and positives. As the examples above illustrate you are welcome to move the negative sign around from where it is to either of the other two positions whichever is most convenient for you. Solving Rational Inequalities With Sign Chart Rational Function Math Notes Rational Expressions There are definitely formulas you can use but they seem to produce incorrect or misleading results. . If we want to turn the denominator positive we simply have to multiply both the numerator and denominator with -1 to turn them into negative and positive quantities respectively. The equation looks like this. The bar between numerator and denominator just means divide the numerator by the denominator. Generally for all b 0 a b a b a b. You need to multiply the -25 by negative 1 converting the -25 to a 25 and then subtract from 50 and divide by 25. In this example x 2 has a negative expo...