x(x+3)-(2x+6)=0

来源:学生作业帮助网 编辑:六六作业网 时间:2024/11/28 14:21:50
x(x+3)-(2x+6)=0x(x+3)-(2x+6)=0x(x+3)-(2x+6)=0x∧2+3x-2x-6=0x∧2+x-6=0a=1b=1c=-6△=b∧2-4ac=25>0x=(-b±√△)

x(x+3)-(2x+6)=0
x(x+3)-(2x+6)=0

x(x+3)-(2x+6)=0
x∧2+3x-2x-6=0
x∧2+x-6=0
a=1 b=1 c=-6
△=b∧2-4ac=25>0
x=(-b±√△)/2a=(-1±5)/2
x1=2
x2=-3

解方程(x-2)X(x的平方-6x-9)=x(x-5)X(x-3) f(x)=(x^3-2)/[2(x-1)^2]求导f'(x)=[6x²(x-1)²-4(x³-2)(x-1)]/[2(x-1)²]²>0即 6x²(x-1)²-4(x³-2)(x-1)>0 (x-1)[6x²(x-1)-4(x³-2)]>0 (x-1)[6x³-6x²-4x³+8]>0 (x-1)(x³-3x²+4)>0 (x- x(x+3)-(2x+6)=0 两道初二数学计算题(1)x+6/x^2+2x+1-x+4/x^2+x=0(2)x+3/x÷x^2+3x/x-3·1/3-x (X-3分之x-1-x分之x-4)除以x的平方+3x分之(x+3)(x-2),其中(x-1)(x-2)=0 已知2x^2+2x-3=0,求代数式x(x^2-x-1)+2(x^2+1)-3分之1x(3x^2+6x)已知2x^2+2x-3=0,求代数式x(x^2-x-1)+2(x^2+1)-3分之1x(3x^2+6x)的值 (x+1分之x+6)-(x^+3x+2分之3x^+10x+4)+(x+2分之2x+1)=0,解这个方程 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 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- 请问这道题咋做 :(x)X (x+1) X (x+2) X (x+3) =360 (x+2)(x+3)=x²+5x+6得能被——整除,且当x=——时,x²+5x+6=0;因为(x-2)(x+3)=x²+x-6,所以(x²+x-6)÷(x-2)=x+3,即x²+x-6能被x-2整除,所以x-2是x²的一个因式,且当x=2时,x²+x- 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 2x-6/4-4x+x^2/(x+2)*x^2-4/3-x,其中x=-1 (x-2)(x²-6x-9)-x(x²-2x-15),其中x=1/3 x/(x-2)-(1-x ² )/(x ² -5x+6)=(2-x)/(x-3) 解方程,急 (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- 因式分解法解下列方程 1、用因式分解法解下列方程:(1)3y^2-5y=0 (2)4x^2=12x (3)x^2+9=-6x (4)9x^2=(x-x^3-3x^2-13x+15 =x^3-3x^2+2x-15x+15 =x(x^2-3x+2)-15(x-1) =x(x-2)(x-1)-15(x-1) =(x-1)[x(x-2)-15] =(x-1)[x^2-2x-15] =(x-1)(x-5)(x+