y=(40-x)(20+2x)=-2x^2+60x+800谁能告诉我这里面的^这个符号是什么意思= =
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![y=(40-x)(20+2x)=-2x^2+60x+800谁能告诉我这里面的^这个符号是什么意思= =](/uploads/image/z/2994688-64-8.jpg?t=y%3D%2840-x%29%2820%2B2x%29%3D-2x%5E2%2B60x%2B800%E8%B0%81%E8%83%BD%E5%91%8A%E8%AF%89%E6%88%91%E8%BF%99%E9%87%8C%E9%9D%A2%E7%9A%84%5E%E8%BF%99%E4%B8%AA%E7%AC%A6%E5%8F%B7%E6%98%AF%E4%BB%80%E4%B9%88%E6%84%8F%E6%80%9D%3D+%3D)
y=(40-x)(20+2x)=-2x^2+60x+800谁能告诉我这里面的^这个符号是什么意思= =
y=(40-x)(20+2x)=-2x^2+60x+800谁能告诉我这里面的^这个符号是什么意思= =
y=(40-x)(20+2x)=-2x^2+60x+800谁能告诉我这里面的^这个符号是什么意思= =
x^2即为x的平方
^是乘方的意思
表示平方
谢谢采纳
x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2
x+y/3+x-y/2=6 4(x+y)-2(x-y)=40
x+y/2+x-y/3=6,4(x+y)-3(x-y)=-20
{(x+y)/2+(x-y)/3=6 4(x+y)-3(x-y)=-20
4(x+y)-3(x-y)=-20,2/x+y+3/x-y=6
y=x^2-2x(x
y=x^2+2x(x
3^x+2x=y,x
填空:x-y/x+y=( )/x^2-y^2
(x-y)2•(y-x)³(x-y)=?
x²-(x-2y)(x+2y)+(x²-y)(y+x²)=?
(x-y) (x-2y)+(x+2y) (x-3y)-2(x-3y) (x-4y)=
(x+y)(x-y)+(x-y)平方-(x-y)(3x-y) 其中x=-2 y=3分之一
已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)
(x-4y)(2x+y)=
(x+y)(2x-3y)=?
x+y>=2,x-y
x+y>=2,x-y