Question

(a^-1-y^-1)*(x-y)^-1 помогите пж 8 класс

Answer 1

$\displaystyle (a^-^1-y^-^1)(x-y)^-^1=(\frac{1}{a}-\frac{1}{y})*\frac{1}{x-y}=\frac{y-a}{ay}*\frac{1}{x-y}=\frac{y-a}{ay(x-y)}=\frac{y-a}{axy-ay^2}$