please help me with these questions

Find the solutionls) to the equation 2:1: 2 1 1/ 2 :1: . Write your answer(s) as decimal numbers (without 'x='}, rounded to two decimal places. Separate multiple answers (if there is more than one} by commas. Solve the equation |4a:5| :9. What is the sum of the two solutions you found? Use decimal notation in your answer. \fThe solution of the inequality a ta.x2 +c