Solve for x:abx²-(a⁴+b⁴)x+a³b³=0

Which system of linear inequalities is represented by the graph?

Can someone me and plz do the problem

Acompany that manufactures and sells guitars made changes in their product range. from the start they had 20 models. then they reduced the number of models to 15. as a result, the company enjoyed a 10% increase in turnover. - how much did the stock level change? in (%)