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解方程:(1)(x+2) 2 =36;(2)x 2 +3x+2=0;...

(1)方程整理得:(x-1)(x+2)-2(x+2)=0,分解因式得:(x+2)(x-1-2)=0,解得:x1=-2,x2=3;(2)这里a=3,b=-9,c=2,∵△=81-24=57,∴x=9±576;(3)方程变形得:(x+2+6)(x+2-6)=0,解得:x1=-8,x2=4;(4)方程整理得:3x2+10x+5...

(1)x2-3x-2=0, x2-3x=2, x2-3x+94=2+94,(x-32)2=174, x-32=±172,x1=32+172=3+172,x2=32-172=3?172; (2)x2=4(2-x),x2+4x=8,x2+4x+4=12,(x+2)2=12,x+2=±2

(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)30X÷2=360, 30X÷2×2=360×2, 30X=720, 30X÷30=720÷30, X=24;(2)2.3X-1.02=0.36,2.3X-1.02+1.02=0.36+1.02, 2.3X=1.38, 2.3X÷2.3=1.38÷2.3, X=0.6;(3)8X-16=(X+1)×2, 8X-16=2X+2, 8X-16+16=2X+2+16, 8X=2X+18, 8X-2X=2X+...

(1)(x+2)2-36=0,(x+2+6)(x+2-6)=0,x+2+6=0,x+2-6=0,x1=-8,x2=4;(2)4x2-3x-1=0,(4x+1)(x-1)=0,4x+1=0,x-1=0,x1=-14,x2=1;(3)2(x-3)2=x2-9,2(x-3)2-(x+3)(x-3)=0,(x-3)[2(x-3)-(x+3)]=0,(x-3)(x-...

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(1)因式分解,得x(3x-6)=0,于是,得x=0,3x-6=0,x1=0,x2=2;(2)因式分解,得,(x-1+x)(x-1-x)=0,于是,得,x-1+x=0,x-1-x=0,x=12;(3)移项,得(x+1)2-(2x-1)2=0,因式分解得,(x+1+2x-1)(x+1-2x+1)=0,于是,得3x=0,...

(1)x2-36=0,分解因式得:(x+6)(x-6)=0,可化为:x+6=0或x-6=0,解得:x1=-6,x2=6;(2)3(x-2)2-9=0,变形得:(x-2)2=3,开方得:x-2=3或x-2=-3,解得:x1=2+3,x2=2-3;(3)3x(x+1)=3x+3,3x(x+1)=3(x+1),3x(x+1)-3(x+1...

4(x-2)²-(3x-1)²=0 4(x-2)²=(3x-1)² 2(x-2)=±(3x-1) 2(x-2)=3x-1 2x-4=3x-1 x=-3 2(x-2)=-3x+1 2x-4=-3x+1 5x=5 x=1 方程的解是x=-3 x=1 (2x-1)²+3(2x-1)+2=0 (2x-1+1)(2x-1+2)=0 2x(2x+1)=0 x=0 x=-1/2 x...

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