Question

Упростите выражение! СРОЧНО!!!

Answer 1

A/(a²-ab)-b/(a²-b²)=a/a(a-b) -b/(a-b)(a+b)=1/(a-b) -b/(a-b)(a+b)=(a+b-b)/(a²-b²)=
=a/(a²-b²)
a=√2  b=√5
√2/(4-5)=-√2/3