y×9等于多少
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应用完全平方公式因式分4+12(x-y)+9(x-y)²=(2+3x-3y)²再答:4+12(x-y)+9(x-y)²=(2-3x+3y)²
约掉y结果32.4再问:看补充问题再答:y不存在无解
y的9n次方相当于是y的3n次方的3次方,所以答案是3的3次方等于27
题在哪
在根9x²y³中,若x≥0,则y≥0,所以根9x²y³=3xy根y.
6xy²-9x²y-y³=-y(9x²-6xy+y²)=-y(3x-y)²
x^2-6x+9-y^2=(x-3)^2-y^2=(x-3+y)(x-3-y)=(x+y-3)(x-y-3)
(x-y)³(x-y)²(y-x)=-(x-y)³(x-y)²(x-y)=-(x-y)³+2+1=-(x-y)^6
8y-9y=-y
x=1y=-2/1再问:谢谢,我还想问一个再答:问吧再问:a的平方b减3ab加2ba的平凡方减b的平方a再答:收藏我可以吗,谢谢
1/3y-2/3y+2y=(1-2+6)/3y=5/3y
4+12(x-y)+9(x-y)^2=2^2+2*2*3(x-y)+[3(x-y)]^2=(2+3x-3y)^2
因为3B+9=6Y-183B+9为B+3的3倍所以B+3=(6Y-18)/3B+3=2Y-6
y/3-2y/3+2y=-y/3+2y=5y/3
-7再问:继续把过程写给我,就采纳你的意见再答:x=-(2+8y)/9则带入4x+5y=-11得到-7
4+12(x-y)+9(x-y)^2=[2+3(x-y)]^2=(2+3x-3y)^2请点击下面的【选为满意回答】按钮,
(5y+1)÷6=(9y+1)÷8-(1-y)÷3[(5y+1)÷6]×24=[(9y+1)÷8-(1-y)÷3]×244×(5y+1)=3×(9y+1)-8×(1-y)20y+4=27y+3-8+8
=[3x-3y+4x+4y][3x-3y-4x-4y]=(7x+y)(-x-7y)=-(7x+y)(x+7y)