(1)6X^2-7x+1=0 (2)5x^2-18=9x (3)4x^2-3x=52 (4)5x^2=4-2x 一元二次方程用配方法,

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(1)6X^2-7x+1=0(2)5x^2-18=9x(3)4x^2-3x=52(4)5x^2=4-2x一元二次方程用配方法,(1)6X^2-7x+1=0(2)5x^2-18=9x(3)4x^2-3x

(1)6X^2-7x+1=0 (2)5x^2-18=9x (3)4x^2-3x=52 (4)5x^2=4-2x 一元二次方程用配方法,
(1)6X^2-7x+1=0 (2)5x^2-18=9x (3)4x^2-3x=52 (4)5x^2=4-2x
一元二次方程用配方法,

(1)6X^2-7x+1=0 (2)5x^2-18=9x (3)4x^2-3x=52 (4)5x^2=4-2x 一元二次方程用配方法,
6X^2-7X+1=0
因式分解 (6x-1)(x-1)=0
则6x-1=0或x-1=0
x=1/6或x=1
5x^2-9x-18=0
因式分解 (5x+6)(x-3)=0
5x+6=0或x-3=0
x=-6/5或x=3
4x^2-3x-52=0
因式分解 (4x+13)(x-4)=0
4x+13=0或x-4=0
x=-13/4或x=4
配方法 很累啊
6x^2-7x+1=0
6(x^2-7/6x)+1=0
6(x^2-2*x*7/12+49/144-49/144)+1=0
6(x^2-2*x*7/12+49/144)-6*49/144+1=0
6(x-7/12)^2-49/24+1=0
6(x-7/12)^2-25/24=0
6(x-7/12)^2=25/24
(x-7/12)^2=25/24*1/6
(x-7/12)^2=25/144
x-7/12=5/12 或者 x-7/12=-5/12
x=5/12+7/12=1 或者 x=-5/12+7/12=2/12=1/6
x=1 或者 x=1/6

解九宫格题目(X为未知数)9 X 2 X 7 X 8 X XX X 4 X X 9 X 6 X1 3 X 5 X X X X 24 X X 8 5 X X 1 XX 8 9 4 X 1 6 7 XX 1 X X 3 6 X X 88 X X X X 2 X 3 6X 5 X 6 X X 9 X XX X 7 X 4 X 2 X 1 *-----------------------------------------------*| 6 4 X | 8 X X | X X 5 || X X X | X X X | X 7 8 || X X X | X X X | X X X ||---------------+---------------+--------------- || X X X | X X X | 5 1 X || X X X | X 6 X | X X X || 8 X X | 3 5 X | 2 X X || 填九宫格帮帮忙.x x 6 x x 7 x x 98 x x x 3 x 1 x x 9 x x 6 x 5 x 3 x x x 3 x x x x 1 8x x x 9 x 1 x x x2 1 x x x x 6 x x x 6 x 7 x 3 x x 1 x x 9 x 2 x x x 47 x x 8 x x 5 x x 解下列方程!就三道!解下列方程.1、x/x-2 - 1-x²/x²-5x = 2x/x-3(x/x-2 - 1-x²不是一起的!)2、5x/x²+x-6 - 5-2x/x²-x-12=7x-10/x²-6x+8(5x/x²+x-6 - 5-2x不是一起的!)3、x-4/x-5 + x-8/x-9=x-7/x- (∫(0到x)t*e^t*sint dt)/x^6*e^x,求极限,x趋于0这样做对吗?=2x*x^2*e^(x^2)*sinx^2/6x^5*e^x+x^6*e^x=2x^5*e^(x^2)/e^x(6x^5+x^6)=2x^5{(e^(x^2)-1) +1}/{(e^x-1)+1}(6x^5+x^6)=2x^5(x^2+1)/(x+1)(6x^5+x^6)=2x^7+2x^5/7x^6+x^7+6x^5由于x趋于 如果1+x+x^2+x^3=0,求x+x^2+X^3+x^4+x^5+x^6+x^7+x^8的值, 3≤|8-x| |x+1|>2-x |x+3|7|x+1| x^2-6|x|+9>0 |x-1|+|x+2|≥5 (1)方法 (x-1)(x-2)=0 (2x-1)²=9 x²-7x+6=0 x(x-1)=x 2x²-5x-12=0 2(x-1=(x-1)(x-2)=0 (2x-1)²=9 x²-7x+6=0 x(x-1)=x 2x²-5x-12=0 2(x-1=(x-1)(x-2) 2x²+3x-18=0 3x²+2x-5=0 x²-4x-7=0.解一元二 解分式方程(要带步骤)解方程:(1):2/(x-3)=3/x; (2):6/(1-x)-(x+5)/[x(1-x)]=0; (3):2/(3x-1)-1=3/(6x-2); (4):10x/(2x-1)+5/(1-2x)=2; (5):(x+2)²/x²-3(x+2)/x+2=0; (6)x/(x²-4)+2/(x+2)=1/(x-2); (7)5/(x²+x)-1/(x²- x+2/x+1-x+4/x+3=x+6/x+5-x+8/x+7 x=? matlab解数值分析题p=(x-1)*(x-2)*(x-3)*(x-4)*(x-5)*(x-6)*(x-7)*(x-8)*(x-9)*(x-10)*(x-11)*(x-12)*(x-13)*(x-14)*(x-15)*(x-16)*(x-17)*(x-18)*(x-19)*(x-20)解为1,2,3……,20取多个非常小的数用软件工具求解方程p(x)+n*x^19=0,并 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, (X-1)(X-2)(X+2)(X+3)=60(X-1)(X-2)(X-3)(X-4)+1=0(X-5)/(X-6)+(X-8)/(X-9)=(X-7)/(X-8)+(X-6)/(X-7) (1) x-3/x-2 - x-5/x-4=x-7/x-6 - x-9/x-8(2) 已知x+3/(x-2)^2=A/x-2 + B/(x-2)^2 ,求A和B的值. 谁能帮我解下列一元二次方程啊(4x+3)(5-X)=02X^2-4X-5=03x(x-1)=2-2xx(x+6)=7(x-1)^2+2x(x-1)=0-3x^2-4x+4=0(X-1)(X+2)=70(3-X)^2+X^2 1.(1/X-1 )-2=X^-3X/X^-12.(X/X+1)^+5(X/X+1)+6=03.(8(X^+2X)/X^-1)+ 3(X^-1)/X^+2x 求一个数独答案X X X 9 X X X 8 2 X 6 3 X X 1 4 X 99 X 8 X X X X X XX X X 6 7 X 3 X XX 4 6 X 5 X 2 9 XX X 7 X 2 3 X X XX X X X X X 7 X 17 X 4 3 X X 6 2 X6 3 X X X 7 X X X