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解方程:(1)(x+2) 2 =36;(2)x 2 +3x+2=0;...

(1)3x(x-2)=2(2-x),3x(x-2)-2(2-x)=0,(x-2)(3x+2)=0,x1=2,x2=-23; (2)x2-2x=5,x2-2x+1=6,(x-1)2=6,x-1=±6,x1=6+1,x2=-6+1.

(1)3x2-22x+24=0(3x-4)(x-6)=03x-4=0或x-6=0∴x1=43,x2=6.(2)(3x+5-1)(3x+5-3)=0(3x+4)(3x+2)=0∴x1=-43,x2=-23.(3)方程整理得:3x2+10x-8=0(3x-2)(x+4)=0∴x1=23,x2=-4.(4)方程整理得:100m2+20m-3=0(10m+3)(10m...

x^3-3x^2-3x+1=0 (x^3+1)-(3x^2+3x)=0 (x+1)(x^2-x+1)-3x(x+1)=0 (x+1)(x^2-x+1-3x)=0 (x+1)(x^2-4x+1)=0 x+1=0或x^2-4x+1=0 求出x有3个解

(3x+2)^2=4(x-1)^2 (3x+2)^2=(2x-2)^2 3x+2=2x-2或3x+2=2-2x 解得x=-4或x=0

解: x³-3x²+2=0 x³-x²-(2x²-2)=0 x²(x-1)-2(x+1)(x-1)=0 (x-1)(x²-2x-2)=0 x-1=0 或x²-2x-2=0 x=1或x²-2x+1=3 (x-1)²=3 x-1=±√3 于是 x1=1+√3 x2=1-√3 x3=1

(1)x 2 =5,∴x=± 5 .(2)(x-3)(x-5)=0∴x 1 =3,x 2 =5.(3)x 2 -6x=-7x 2 -6x+9=2(x-3) 2 =2x-3=± 2 ∴x=3± 2 .(4)y 2 -2 2 y+2=0△=8-8=0y 1 =y 2 = 2

稍等,还有一小问

把x=0代入方程,得m2-4=0,解得m=±2,∵m+2≠0,∴m≠-2,∴m=2,把m=2代入方程,得4x2+3x=0,解得x1=0,x2=-34.答:m的值是2,方程的另一根是-34.

3X-2.5ⅹ1/3=0.75 解:3X-5/6=3/4 3X=3/4+5/6 3X=19/12 X=19/12÷3 X=19/36

#include #include using namespace std; double func(double x) { return pow(x,3)-3*pow(x,2)+6*x-1; } int main() { double midx, midy, x1 =0.0, x2 = 1.0; do { midx = (x1 + x2) / 2; x2 = (func(midx) > 0)?midx : x2; x1 = (func(midx) ...

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