35x+(35—5)×(x+2)=580(列方程)

15-(4-5x)=2x+(35-3x) =（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 =(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 解方程：x/(2x-11x-21)=(x-5)/(x2-12x+35) 求x对不起 x/(2x^2-11x-21)=(x+7)/(x^2-12x+35) (2x-1)/(x-1)(x-2)=(x-5)/(x-2)(x-3) x/2x^2-11x-21=(x+7)/x^2-12x+35 解方程 18%x+32%x=2 x+20%x=2.4 x+5%x=4.2 15%x+35%x=0.2 x/2x*2-11x-21=x+7/x*2-12x+35 解方程（按顺序解答,3.8+X=12.8 6.4+X=15.6 X-4.8=4.8 1.5-X=0.84 2X+0.82=0.82 3+0.5=7 2X+0.4X=48(并检验)8x—x=14.735x+13x=9.65（x+3）=35x+3.7x+2=16.114x+3x—1.2x=15818—2.5x=13(并检验)1.5x—6=3（并检验）9.5x—5x=277x—0.6x=16 4(x+5)=35-x 154-2x=3(36+x) 4(x+5)=35-x 1584-2x=3(36+x) 1/4x+2/5x+(x-35)=2X 35(x-2)-15(5x-6)=(22x-63)-21(3x-4)咋算? 解方程(X+2)(4X-5)-4X*X=35 35（x-2)-15(5x-6)=22x-63-21(3x-4) 35*(2-X)+15*(6-5X)=22X+7+21*(4-3X) 35(X-2)+15(5X-6)=(22X-51)+21(3X-4) 解方程：（x+2）·（4x-5）=4x·x+35 (14x+7)(25x-36)+7(1+2x)(35-25x)=-5