(50+2x)(50-x)=2100
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(50+2x)(50-x)=2100(50+2x)(50-x)=2100(50+2x)(50-x)=2100(50+2x)(50-x)=21002500+50x-2x²=2100x²
(50+2x)(50-x)=2100
(50+2x)(50-x)=2100
(50+2x)(50-x)=2100
(50+2x)(50-x)=2100
2500+50x-2x²=2100
x²-25x-200=0
x=(25±5√57)/2
2500-2X2=2100 X=+-20
-2x^2+50x+400=0
x^2-25x-200=0
x1≈31.37
x2≈-6.37
-2x平方+50x+2500=2100
x平方-25x-200=0
△=625+800=1425
x=2分之(25加减5根号57)
x=20或x=-10
x+3x+x-2+x+x+50%x=188 求x
(30+2X)x(50-X)=2100
(50+2x)(50-x)=2100
(x+1)+(x+2)+(X+3).+(x+50)=1325
x+ x+(x*50%)=1.5X?
5(x²+17)-6(x²+2x)=0 (50-x)(30+2x)=21005(x²+17)-6(x²+2x)=0(50-x)(30+2x)=2100
10x+2x*[(50-x)/2]+5x[(50-x)/2]=240
30x+20x-x^2=50x-x^2 怎么算
90/(x-90)=(2x-50)/(x+50)
50*2X=X*(50-X)*10
50/(x-50)=(x+18)/(2x-18)
=(x^2-5x)^2+10(x^2-5x)+24 =x^4-10x^3+25x^2+10x^2-50x+24 这是怎么转化的(X-1)(X-2)(X-3)(X-4) =(X-1)(X-4) (X-2)(X-3)=(x^2-5x+4)(x^2-5x+6)=(x^2-5x)^2+10(x^2-5x)+24=x^4-10x^3+25x^2+10x^2-50x+24=x^4-10x^3+35x^2-50x+24
x/50-4=x/60+2 x=?
2乘(50-x)-1.6x=17.2 x=?
=(x^2-5x+4)(x^2-5x+6) =(x^2-5x)^2+10(x^2-5x)+24 是怎么转化的(X-1)(X-2)(X-3)(X-4) =(X-1)(X-4) (X-2)(X-3)=(x^2-5x+4)(x^2-5x+6)=(x^2-5x)^2+10(x^2-5x)+24=x^4-10x^3+25x^2+10x^2-50x+24=x^4-10x^3+35x^2-50x+24不好意思我弄错了,是=(x^2-5
3x-2x(50-x)=30
50x^2+25x-8=0求x
3.14*(0.5x)(0.5x)*2x=50