x^2+_______-2y^2=(x-y)(________) a^2+(n/m)a+(_____)=(____+____)^2当k=____时,多项式3x^2+7x-k有一个因式为( )

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x^2+_______-2y^2=(x-y)(________)a^2+(n/m)a+(_____)=(____+____)^2当k=____时,多项式3x^2+7x-k有一个因式为()x^2+___

x^2+_______-2y^2=(x-y)(________) a^2+(n/m)a+(_____)=(____+____)^2当k=____时,多项式3x^2+7x-k有一个因式为( )
x^2+_______-2y^2=(x-y)(________) a^2+(n/m)a+(_____)=(____+____)^2
当k=____时,多项式3x^2+7x-k有一个因式为( )

x^2+_______-2y^2=(x-y)(________) a^2+(n/m)a+(_____)=(____+____)^2当k=____时,多项式3x^2+7x-k有一个因式为( )
x^2+__xy_____-2y^2=(x-y)(__x+2y______)
a^2+(n/m)a+(__n²/4m²___)=(__a__+__n/2m__)^2
当k=__0__时,多项式3x^2+7x-k有一个因式为( 3x+7)