已知x/y=3,则x²+xy/y²的值是______.

已知x/y=3,则x²+xy/y²的值是______.
已知x/y=3,则x²+xy/y²的值是______.

已知x/y=3,则x²+xy/y²的值是______.
x/y=3
x=3y
x²+xy/y²
=9y²+3x*y/y²
=12y²/y²
=12

x/y=3, x=3y
(x²+xy)/y²
=[(3y)²+3y*y]/y²
=(9y²+3y²)/y²
=12y²/y²
=12

已知x/y=3,则的值是______。
x/y=3,
x=3y
﹙x²+xy﹚/y²
=[﹙3y﹚²+3y×y]/y²
=﹙9y²+3y²）/y²
=12