Question

помогите плиззз!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Answer 1

$frac{(y-x)^2}{x+y} :( frac{2xy}{y^2-x^2}+ frac{x}{x+y}- frac{y}{y-x} )= frac{(y-x)^2}{x+y} : frac{2xy+x(y-x)-y(x+y)}{y^2-x^2} = \ = frac{(y-x)^2}{x+y} : frac{2xy+xy-x^2-xy-y^2}{y^2-x^2} = -frac{(y-x)^2(y-x)(y+x)}{(x+y)((x-y)^2)}= \ =x-y=8.4-(-0.6)=9$