(3x+___)²=____+12xy+____.已知:(x-3y)²=x²-6xy+(ky)²,则k=____.

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(3x+___)²=____+12xy+____.已知:(x-3y)²=x²-6xy+(ky)²,则k=____.

(3x+___)²=____+12xy+____.已知:(x-3y)²=x²-6xy+(ky)²,则k=____.
(3x+___)²=____+12xy+____.已知:(x-3y)²=x²-6xy+(ky)²,则k=____.

(3x+___)²=____+12xy+____.已知:(x-3y)²=x²-6xy+(ky)²,则k=____.
(3x+_2y__)²=_9x²__+12xy+_4y_²__.
(x-3y)²=x²-6xy+(ky)²,则k=3

(3x+2y)²=9x²+12xy+4y²。
(x-3y)²=x²-6xy+(ky)²,则k=9