Question

Спасите меня ((Немогу найти

Answer 1

a)$frac{3x-(x-8)}{x-4}= frac{2x-8}{x-4}= frac{2(x-4)}{x-4} =2$

б)$frac{y-x}{(y-3)(y+3)} - frac{x-3}{-(y^2-9)} = frac{y-x}{(y-3)(y+3)} + frac{x-3}{(y-3)(y+3)} \ frac{y-x+x-3}{(y-3)(y+3)}= frac{1}{y+3}$

a)$frac{b-a}{ab} + frac{b-a}{b^2}= frac{b(b-a)+a(b-a)}{ab^2}= frac{b-ab+ab-a^2}{a^2}= frac{b^2-a^2}{ab^2}$

б)$x^2+ frac{2x^2}{x-2}= frac{x^2(x-2)+2x^2}{x-2}= frac{x^3-2x^2+2x^2}{x-2}= frac{x^3}{x-2}$