1/4的4次方-(1/12y)+4/9y²=(1/4²-2/3y)²=(1/16-2/3y)²1/4的4次方-(-1/12y)+4/9y²=1/4的4次方+1/12y+4/9y²=(1/4²+2/3y)²=(1/16+2/3y)²请点击下面的【选为满意回答】按...