6. Is it true to solve a rational inequality you should: a) write the inequality in standard form: it should be only one fraction and zero to the right b) find zeroes of the numerator and the denominator c) place these zeroes on the number line. Pay attention to the boundary points: open or closed. Note: zeros of the denominator are always opened points because the denominator # 0 d) find the sign + or - of each interval, by taking a number from each interval and evaluating the inequality written in standard form for this number el select the corresponding interval according to the sign of the inequality written in standard form. Write the answer in interval notation. Move from left to right