Question

Помогите решить примеры по алгебре

Answer 1

a) $\frac{4y-3}{6y} + \frac{y+2}{4y} = \frac{2(4y-3)+3(y+2)}{12y} = \frac{8y-6+3y+6}{12y} = \frac{11y}{12y} = \frac{11}{12}$

б) $\frac{a}{a+5}-\frac{a}{a-5} = \frac{a(a-5)-a*(a+5)}{(a+5)(a-5)} = \frac{a^{2}-5a-a^{2} - 5a }{a^{2} - 25 } = \frac{-10a}{a^{2} - 25 } = -\frac{10a}{a^{2} -25 }$