Ответ:

[tex]2) \frac{ab + {a}^{2} }{a} = \frac{a(b + a)}{a} = b + a[/tex]

[tex]5) \frac{2 {x}^{2} + 3xy}{2xy + 3 {y}^{2} } = \frac{x(2x + 3y)}{y(2x + 3y)} = \frac{x}{y} [/tex]