y=x方＋2x－3配方

2x方-1=3x配方法解2x²-1=3x2x²-3x-1=0x²-3/2x-1/2=0(x²-3/2x+9/16)-9/16-1/2=0(x-3/4)²-17/16=0(x-3/4)

配方化顶点式二次函数Y=2X方-X+1Y=2X方-3X+1Y=二分之一X方+3X方-二分之七y=2(x-1/4)2+7/8y=2(x-3/4)2-1/8y=7x2/2-7/2

y=5x方+6x配方法y=5(x²+6x/5)=5(x²+6x/5+9/25-9/25)=5(x²+6x/5+9/25)-9/5=5(x+3/5)²-9/5

3x方-1=2x用配方法用配方法解一元二次方程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=

用配方法解：3y方+1=2乘根号3y（2）2x方=3-7x（3）6x方-x-2=0（4）9x方+6x方-8=0（5）5x方-3=x方,坐等.（1）3y方+1=2乘根号3y3y方-2乘根号3y=-1y^2-2乘三分之根号3/y=-1/3y^2

3x方+2y方=2x,求x方+y方范围3x²+2y²=2x可得y²=（2x-3x²）/2≥0即2x-3x²≥03x²-2x≤0,x（3x-2）≤0,解得0≤x≤2/3x^2+y^2

4(x方+y)(x方-y)-(2x方-y)方,其中x=2,y=-34(x²+y)(x²-y)-(2x²-y)²=4(x⁴-y²)-(2x²-y)²=4(x&#

x方-4x+3=0怎样用配方法解啊,x方-4x+3=0x方-4x+4-1=0x方-4x+4=1(x-2)²=1x-2=±1x=3或x=1

x方-8x+2=0配方法解x²-8x+2=0x²-8x=-2x²-8x+16=14(x-4)²=14∴x-4=√14或x-4=-√14∴x=4+√14或x=4-√14

[x-3]方＋4x[x-3]=0配方解方程我这样写比较好原式=（x-3）（x-3）+4x（x-3）提取公因式x-3=（x-3）（x-3+4x）=（x-3）（5x-3）=0解得x=3或x=0.6

X方+2根号3X+3=1（用开平方法）-X方+6X=7（用配方法）X方-X=1x方+2根号3x+3=1(x+根号3）方=1所以x+根号3=根号1或x+根号3=负根号1x1=1-根号3x2=-1-根号3

用配方法:X方-二分之一X+1；-3X方-2X+1x²-x/2+1=(x²-x/2+1/16)+15/16=(x-1/4)²+15/16-3x²-2x+1=-3(x²-2x/3+1/9)+4

y=-x²/2-3x/2+2配方解y=-x²/2-3x/2+2=-1/2(x²+3x)+2=-1/2(x²+3x+9/4)+9/8+2=-1/2(x+3/2)²+25/8y=-1/2*（x+

y=3x*2-x+2怎么样配方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y=3x*2-x+2=3[x-(1/6)]^2+23/12

y=3x^2-x+2的配方 

配方y=3x^2-2x+43(x-1/3)^2+11/3

y=3x^2-2x+1配方y=3(x²-2x/3)+1=3(x²-2x/3+1/9-1/9)+1=3(x²-2x/3+1/9)-1/3+1=3(x-1/3)²+2/3

y=2x^2-3x+1配方y=2x^2-3x+1=2(x^2-3/2x+9/16)-2*9/16+1=2(x-3/4)^2-1/8y=2x²-3x+1=2(x-(3/4))²-(1/8)题目不明确，你要问什么？（2x-1

配方y=2x^2+3x-5y=2(x²+3x/2)-5=2(x²+3x/2+9/16-9/16)-5=2(x²+3x/2+9/16)-9/8-5=2(x+3/4)²-49/8

y=-2x²-3x+1配方y=-2x²-3x+1=-2(x²-3x/2)+1=-2[x²-3x/2+(3/4)²]+2×(3/4)²+1=-2(x-3/4)²+17/8y