2x^2 1=3x配方法
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4x^2-4√3x+3=x^23x^2-4√3x=-3x^2-4√3x/3=-1x^2-4√3x/3+4/3=-1+4/3(x-2√3/3)^2=1/3x-2√3/3=±√3/3x=2√3/3±√3/
4x^2+8x-3=04(x+1)^2-7=0x+1=±√7/2x=(-2±√7)/22x^2+1=3x2(x-3/2)^2-7/2=0x-3/2=±√7/2x=(3±√7)/2
1)-3X的平方+22X-24=0即:x^2-22/3x+8=0(x-11/3)^2=49/9x-11/3=(+/-)7/3x1=11/3+7/3=6x2=11/3-7/3=4/32)2x^2+6=7
2x²-6x=7x-6;2x²-13x+6=0;2(x²-13x/2)+6=0;2(x-13/4)²+6-169/8=0;2(x-13/4)²=121
y=3x^2+2x.=3(x^2+2/3x).=3(x+1/3)^2-1/3.y=-x^2-2x.=-2(x^2+x).=-2(x+1/2)^2+1/2.y=-2x^2+8x-8.=-2(x^2-4x
1.y=3(x^2-1/3x)+22.y=3(x^2-1/3x+1/36)-1/12+23.y=3(x-1/6x)^2+23/12完毕
2x²+3x+1=02(X+3/4)²=1/8所以X=-1/2或X=-1再问:答案是你这个我做出来是(X+3/4)²=1/4再答:对于配方法最好的就是检验一下,自己算一下
3x方-2x-1=03(x²-2x/3+1/9)-1/3-1=03(x-1/3)²=4/3(x-1/3)²=4/9x-1/3=±2/3x1=1/3+2/3=1x2=1/3
2x²-7x=10x²-7x/2=5x²-7x/2+(7/4)²=5+49/16(x-7/4)²=129/16x-7/4=±(√129)/4x1=(7
x²-8X+4-6=0(x-2)²=6x-2=根号6x=2+根号6
(x-3)^2+4x(x-3)=0用配方法解方程(x-3)(x-3+4x)=0(x-3)(5x-3)=0x=3或者x=5分之3施主,我看你骨骼清奇,器宇轩昂,且有慧根,乃是万中无一的武林奇才.潜心修习
移项得:x2-2x=3,配方得:x2-2x+1=3+1,即(x-1)2=4,开方得:x-1=±2,故原方程的解是:x1=3,x2=-1.再问:根号8-(-2014)度+|-3|
(2x-1)(3x-1)=3-6x6x²-5x+1=3-6x6x²+x=2x²+1/6x=1/3x²+1/6x+1/144=1/3+1/144(x+1/12)&
x²+3x/2=3/2x²+3x/2+9/16=3/2+9/16(x+3/4)²=33/16x+3/4=±√33/4x=(-3-√33)/4,x=(-3+√33)/4
提负号:—(x∧2—3x—5)将x∧2—3x中3除以二配方得:—(x∧2—3x+9/4—9/4—5)—((x—3/2)∧2—9/4—5)得—(x—3/2)∧2+29/4
1.x^2-x=7/4x^2-x+1/4=2x-1/2=根号2x=根号2+1/22.x^2+2x-4/3=0x^2+2x=4/3x^2+2x+1=7/3x=1/3根号21-1
-2x²-4x-3=-2(x²+2x+1-1)-3=-2(x+1)²-1当x=-1时,有最大值-1,此时小于0故原式成立
4x^2-x-9=0两边同时除以4,得x^2-(1/4)x-(9/4)=0移项,得x^2-(1/4)x=9/4两边同时加上(1/8)^2,得x^2-(1/4)x+(1/8)^2=(9/4)+(1/8)