9y-y等于多少
来源:学生作业帮助网 编辑:作业帮 时间:2024/11/18 12:58:18
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
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
y=19.8-15.84=3.96x=y除以19.8=0.2
x=6y,3x-y=18y-y=6,y=6/17,x=17
1/3y-2/3y+2y=(1-2+6)/3y=5/3y
2y2+3y+7=8,则2y2+3y=1,则4y2+6y=2(2y2+3y)=2,所以4y2+6y-9=2-9=-7
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
(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
x=8/3y=15/4就是这个了...
两式相加,得5x+5y=90因此3x+3y=54又3x+2y=44,y=102x+3y=46x=8