(1)1-100x =(1+10x)(1-10x) (2)-0.16+a b =(ab) -0(1)1-100x =(1+10x)(1-10x) (2)-0.16+a b =(ab) -0.4 =(ab+0.4)(ab-0.4) (3)(a+b+c) -(a-b-c) =(a+b+c+a-b-c)(a+b+c-a+b+c) =2a(2b+2c) =4a(b+c) (4)9a -(b-c) =(3a+b-c)(3a-b+c) 5
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(1)1-100x =(1+10x)(1-10x) (2)-0.16+a b =(ab) -0
(1)1-100x =(1+10x)(1-10x)
(2)-0.16+a b =(ab) -0.4 =(ab+0.4)(ab-0.4)
(3)(a+b+c) -(a-b-c)
=(a+b+c+a-b-c)(a+b+c-a+b+c)
=2a(2b+2c)
=4a(b+c)
(4)9a -(b-c)
=(3a+b-c)(3a-b+c)
5)100p -4q的6次方
=(10p) -(2q )
=(10p+2q )(10p-2q )
=4(5p+q )(5p-q )
(6)4(2x+y) -9(x-2y)
=[2(2x+y)] -[3(x-2y)]
=[2(2x+y)+3(x-2y]][2(2x+y)-3(x-2y]
=[4x+2y+3x-6y][4x+2y-3x+6y]
=(7x-4y)(x+8y)
好好想挖..(100-X)*1/3-1/10X=16
100/3-x/3-x/10=16
x/3+x/10=100/3-16
13x/30=52/3
x=40
看绘图仪黄花岗
X(X-1)=X
解方程(x/x(x+2))+(x/(x+2)(x+4))+.+x/(x+8)(x+10)=1
X+X+X+(X-1)+(X-2)+(X-3)+(X-4)=10(X-3)+(X-4)
x+x+1=(10x+x+1)×5
x/x+(1-x)/x-1/x
1/X(X+1)+1/(X+1)(X+2)+1/(X+2)(X+3).+1/(X+99)(X+100)=
1+x+x^2+x^3+x^4+x^5+x^6+x^7+x^8+x^9+x^10+x^11+x^12=97.8x+x^2+x^3+x^4+x^5+x^6+x^7+x^8+x^9+x^10+x^11+x^12=97.8 好多年没有用过过数学公式了 想不起来怎么算了 想知道 X值是多少
已知x=2π+1求 |x-1|+|x-2|+|x-3|+|x-4|+|x-5|+|x-6|+|x-7|+|x-8|+|x-9|+|x-10|
x>=1,x
已知x=2π+1.求(X-1)+(X-2)+(X-3)+(X-4)+(X-5)+(X-6)+(X-7)+(X-8)+(X-9)+(X-10)
1+x+x^2+x^3+x^4+x^5+x^6+x^7+x^8+x^9+x^10+x^11=17.7这个方程怎么样求解?
解方程:2x+4x+6x...+100x=1-(x+3x+5x+...+99x)
1X+2X+3X…+98X+99X+100X=50500X X等于多少?
1x+2x+3x+4x+5x+6x+7x…+99x=100
1/(x-1)x+1/x(x+1)+.+1/(x+9)(x-10)=?
10/150x-1=10/100x.求x
x/x-2+x-9/x-7=x+1/x-1+x-8/x-6,
x/x-2+x-9/x-7=x+1/x-1+x-8/x-6,