[tex]speed \: = \frac{distance}{time} [/tex]
[tex] \frac{(15x²+37x+20)}{(3x + 5)} \\ factor \: ( {15}^{x2} + 37x + 20)[/tex]
[tex] \frac{(5x + 4)(3x + 5)}{(3x + 5)} \\ cancel \: common \: factor \\[/tex]
speed = [tex] \bold{\underline{5x + 4}}[/tex] km/hr
