(100-2x)(50-2x)=3600 5000-200x-100x+4x(2)=3600 4x(2)-300x+1400=0(100-2x)(50-2x)=36005000-200x-100x+4x^2=36004x^2-300x+1400=0为什么不是5000-3600=200x+100x+4x^2=300x+100x+4x^2-1400=0
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(100-2x)(50-2x)=36005000-200x-100x+4x(2)=36004x(2)-300x+1400=0(100-2x)(50-2x)=36005000-200x-100x+4x^
(100-2x)(50-2x)=3600 5000-200x-100x+4x(2)=3600 4x(2)-300x+1400=0(100-2x)(50-2x)=36005000-200x-100x+4x^2=36004x^2-300x+1400=0为什么不是5000-3600=200x+100x+4x^2=300x+100x+4x^2-1400=0
(100-2x)(50-2x)=3600 5000-200x-100x+4x(2)=3600 4x(2)-300x+1400=0
(100-2x)(50-2x)=3600
5000-200x-100x+4x^2=3600
4x^2-300x+1400=0
为什么不是5000-3600=200x+100x+4x^2
=300x+100x+4x^2-1400=0
(100-2x)(50-2x)=3600 5000-200x-100x+4x(2)=3600 4x(2)-300x+1400=0(100-2x)(50-2x)=36005000-200x-100x+4x^2=36004x^2-300x+1400=0为什么不是5000-3600=200x+100x+4x^2=300x+100x+4x^2-1400=0
第四行4前的正负号错了
（100-2X）x（50-2x）=3600算一下x=?
(100-2x)(50-2x)=3600 5000-200x-100x+4x(2)=3600 4x(2)-300x+1400=0(100-2x)(50-2x)=36005000-200x-100x+4x^2=36004x^2-300x+1400=0为什么不是5000-3600=200x+100x+4x^2=300x+100x+4x^2-1400=0
x+3x+x-2+x+x+50%x=188 求x
x-2x+3x-4x+5x.+99x-100x=25求解
2x+3x+4x+5x+x+6x+7x=100
x/2*50+100=50x
(x+1)+(x+2)+(X+3).+(x+50)=1325
x+2x+3x+.+100x
f(x)=x^2+x (x
y=|x-1|+|x-2|+|x-3|+|x-4|+|x-5|+|x-6|……+|x-99|+|x-100|+50n的最小值
1/X(X+1)+1/(X+1)(X+2)+1/(X+2)(X+3).+1/(X+99)(X+100)=
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
(100-2x)(50-2x)=3600怎么求?
（100-2x）（50-2x）=3600
（100-2x）（50-x）=3600
100(X - 2) + 10X + 2X = 100*2X + 10X + X - 2 - 495