Объяснение:
X²/(x²+9xy):x/(x²-81y)=x²/x(x+9y)*(x²-81y²)/x
=x/(x+9y)*(x-9y)(x+9y)/x=
x-9y=7-9√2-45+9√2=-38
Объяснение:
X²/(x²+9xy):x/(x²-81y)=x²/x(x+9y)*(x²-81y²)/x
=x/(x+9y)*(x-9y)(x+9y)/x=
x-9y=7-9√2-45+9√2=-38