展開の利用です。 x+y+z\u003d2、xy+yz+zx\u003d1のとき
y zx Discover cheap clothes, shoes and accessories for men at Our shop Outlet. Shop the latest menswear collection at cheap prices.
Product reviews:
Ken
2026-03-27iphone 11
x x2 yz y y2 zx z z2 xy| \u003d (x-y) (y-z y zx
y zx
Rock
2026-03-22iphone XS Max
Y-3 ZX Run leather and suede trainers y zx
y zx
Uriah
2026-03-19iphone 6s Plus
If x+y+z\u003d9 and xy+yz+zx\u003d23, the value y zx