Помогите решить 4 задание

Question

Помогите решить 4 задание

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Answer 1

(5/(25-х²)+1/(х-5))/(х/(2х²-20х+50)=(-5/((х+5)(х-5))+1/(х-5))/х/(2*(х²-10х+25))=((-5+х+5)((х-5)(х+5))/(х/(2*(х-5)²)=(х/((х-5)(х+5))/(х/(2*(х-5)²)=
=х*2*(х-5)²/(х*(х-5)*(х+5))=2*(х-5)/(х+5).