Question

(y/5x-5x/y):(y+5x) помогите кто знает

Answer 1

$( frac{y}{5x} - frac{5x}{y} ) / (y+5x)= frac{ y^{2} - 25 x^{2} }{5xy} * frac{1}{y+5x} = frac{(y-5x)(y+5x)}{5xy*(y+5x)} = frac{y-5x}{5xy}$