Question

Решите номер 41.Есть вложение.

Answer 1

$frac{y}{x} =2 \ y=2x \ frac{2xy+x^2}{3xy-y^2} = frac{2x(2x)+x^2}{3x(2x)-(2x)^2} = frac{4x^2+x^2}{6x^2-4x^2} =frac{5x^2}{2x^2} =2.5$

$frac{a}{b} =4 \ a=4b \ frac{2a^2-ab}{ab+3b^2} = frac{2(4b)^2-(4b)b}{(4b)b+3b^2} =frac{32b^2-4b^2}{4b^2+3b^2} =frac{28b^2}{7b^2} =4$