Question

Вычислите $frac {x^{2}-3xy+ y^{2} }{ x^{2}+ y^{2} }  если  [tex] frac{x}{y} = frac{1}{4}$

Answer 1

y=4x
(x²-12x²+16x²)/(x²+16x²)=5x²/17x²=5/17