早教吧作业答案频道 -->数学-->
(1)x³-2x=(2)5x²-10x-5=(3)x²-16y²=(4)(a+b)²-1=(5)x²-2xy+y²-16=(6)(a+b)²-2(a+b)c+c²=(7)x²-3xy+2y²=(8)2a+4+3ab+6b=(9)9-a
题目详情
(1)x ³ -2x= (2)5x ² -10x-5= (3)x ² -16y ² =
(4)(a+b)² -1= (5)x ² -2xy+y ² -16= (6)(a+b)² -2(a+b)c+c ²=
(7)x ² -3xy+2y ² = (8)2a+4+3ab+6b= (9)9-a ² -b ² -2ab=
(10)x的四次方+4y 的四次方=
(4)(a+b)² -1= (5)x ² -2xy+y ² -16= (6)(a+b)² -2(a+b)c+c ²=
(7)x ² -3xy+2y ² = (8)2a+4+3ab+6b= (9)9-a ² -b ² -2ab=
(10)x的四次方+4y 的四次方=
▼优质解答
答案和解析
(1)x(x-√2)(x+√2)
(2)5[(x-1-√2)(x-1+√2)]
(3)(x+4y)(x-4y)
(4)(a+b-1)(a+b+1)
(5)(x-y-4)(x-y+4)
(6)(a+b-c)^2
(7)(x-y)(x-2y)
(8)(a+2)(3b+2)
(9)(3-a-b)(3+a+b)
(10)(x^2+(4y)^2+4√2xy)(x^2+(4y)^2-4√2xy)
(2)5[(x-1-√2)(x-1+√2)]
(3)(x+4y)(x-4y)
(4)(a+b-1)(a+b+1)
(5)(x-y-4)(x-y+4)
(6)(a+b-c)^2
(7)(x-y)(x-2y)
(8)(a+2)(3b+2)
(9)(3-a-b)(3+a+b)
(10)(x^2+(4y)^2+4√2xy)(x^2+(4y)^2-4√2xy)
看了 (1)x³-2x=(2)5x...的网友还看了以下:
下列说法不正确的是a.若x=y,则x+a=y+ab.若x\a=y\a,则x=yc.若-3x=-3y 2020-06-04 …
求定义域在[-1,1]上的函数y=(a+bx)/(a-bx)(a>b>0)的值域请用反函数求解由y 2020-06-11 …
20.x^2/a^2+y^2/b^2+z^2/c^2=1成立;20.x^2/a^2+y^2/b^2 2020-06-11 …
已知集合A={y|y^2-(a^2+a+1)y+a(a^2+1)>0},B={y|}y=(1/2x 2020-06-12 …
协方差cov(X+20,Y+10)=cov(X,知道了COV(X+a,Y+b)=E[(X+a)(Y 2020-06-17 …
对于实数集合X,Y,集合X◆Y定义为:X◆Y={x+y|x∈X,y∈Y},集合X◇Y定义为X◇Y= 2020-07-30 …
1..设x/a+y/b+z/c=1,a/x+b/y+c/z=0,求x*2/a*2+y*2/b*2+z 2020-10-30 …
一道初二数学题,急!设a=x/y+z,b=y/x+z,c=z/x+y,且x+y+z不等于0.求代数式 2020-10-31 …
1.已知x+y+z=3a,(a不等于0,且x,y,z不全相等),求(x-a)(y-a)+(y-a)( 2020-10-31 …
以下程序段的执行结果是inta,y;a=10;y=0;do{a+=2;y+=a;printf("a= 2020-12-15 …