(1)(x-y)=_____(y-x);(2)(b-a)²=_____(a-b)²;(3)-z-y=_____(y+z);(4)(x-y)³=____(y-x)³
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(1)(x-y)=_____(y-x);(2)(b-a)²=_____(a-b)²;(3)-z-y=_____(y+z);(4)(x-y)³=____(y-x)³
(1)(x-y)=_____(y-x);(2)(b-a)²=_____(a-b)²;(3)-z-y=_____(y+z);(4)(x-y)³=____(y-x)³
(1)(x-y)=_____(y-x);(2)(b-a)²=_____(a-b)²;(3)-z-y=_____(y+z);(4)(x-y)³=____(y-x)³
(1)(x-y)=_____(y-x);(2)(b-a)²=_____(a-b)²;(3)-z-y=_____(y+z);(4)(x-y)³=____(y-x)³
1、-
2、1
3、-
4、-
-
+
-
+-
最后一个不能确定,所以填正负
第一个是负号,第二个填1,第三个填负号,第四个还是负号。
赞同下面的说法,
按顺序:— 不填 — —
计算:[(x+y)³ - (x+y)²]÷(x+y)²=_____
如果|x-1|+(y+5)2=0 则x=____ y=_____
已知|4x+y-3|与(2y+1)的平方 互为相反数,则x+2y=_____
已知x^2-6y^2=-xy,x>0,y>0且x不等于y.则(x+3y)/(x-y)的值为_____?
设全集U={(x,y)|x,y∈R},集合M={(x,y)|y+2/x-2=1},N={(x,y)|y≠x-4}那么(CuM)∩(CuN)等于_____
y(x+y)+(x-y)²-(x+y)(x-y),其中x=-1/3,y=3
若x、y为自然数,且满足x(x+y)-y(x+y)=11,则x= ___,y= ____或x=_____,y=_____(填空题)若x、y为整数,且满足x(x+y)-y(x+y)=11,求x、y的值.(注意考虑多种情况)
若|x-2y+3|+|x-1|=0,则代数式3(x-y)+2的值为_____.
已知x+y=30,x-y=20,则2(x-2y)-132的值为_____.
(x+3y-2z)(x-3y-2z)-(x+3y-2z)^2 要过程还有一道:填空:(x-y+1)(x+y-5)=(x-y-2+_____)(x+y-2-_____)=[(x-2)-(____)]*[(x-2)+(____)]=(____)^2-(____)^2=_________
4x的平方+y的平方=(2x-y)的平方+_____
代数式x-1分之x中,字母的取值范围是_____.已知x-5y=0(y≠0),则代数式2x-3y分之3x+6y的值是__1.代数式x-1分之x中,字母的取值范围是_____.2.已知x-5y=0(y≠0),则代数式2x-3y分之3x+6y的值是_____.3.已知x+
函数y=1+In(x-1)(x>1)的反函数为_____
解方程9y^2=(y-1)^2 (4x-1)^2=(1-5x)^29y^2=(y-1)^2 (4x-1)^2=(1-5x)^2x-y=2 x^2-y^2=6 则x=_____ y=_____
实数x,y满足x^+(y+4)^2=4,则(x-1)^2+(y-1)^2的最大值为_____?
如果|x-2y+1|=|z+y-5|=|x-z-3|=0,那么x=_____,y=_______,z=_______.)
1.当x=_____时,分式|x|-2/x-2无意义.2.化简:2a/a-b+a+b/b-a=_____化简:1.x/x²-1(x-1/(x)-2)解方程:1.2/x-1=4/x²-1先化简,再求值:x/(x-y)²×x²-y²/(x+y)+2x+2/(x-y)-2其中x,y满足方程组x+2y=3,
①(-2x-1/3y)²=____②{(-5+x)(-5-x)}²=_____③(x+y+z)(x-y-z)=___.④若x²+y²快