Question

Распишите пожалуйста, всё на листе.
Даю 50 балов.

Answer 1

$\displaystyle\frac{x^7y^4+x^5y^6}{x^5y^4} = \frac{x^5y^4(x^2+y^2)}{x^5y^4} = x^2+y^2 = 0.36+0.64=1\\\\\frac{5x^3-125x}{2x^3-20x^2+50x} =\\\\= \frac{5x(x^2-25)}{2x(x^2-10x+25)} = \frac{5(x-5)(x+5)}{2(x-5)^2} = \frac{5(x+5)}{2(x-5)} = \frac{55}{2}=27.5$