(x-1)²=2x 1 用因式分解法解方程
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2(x-1)^2=3x^2-32x²-4x+2=3x²-3x²+4x-5=0(x-1)(x+5)=0x1=1,x2=-5
可以这样:设两个变量,令x1=x(1),x2=x(2),后面的和你上面写的一样.再问:不行啊~~而且我想求的是f=x(1)^2+x(2)diff(f,x(1))diff(f,x(2))不是f=x1^2
X(X+8)=16x²+8x=16x²+8x+16=16+16(x+4)²=32x+4=±4√2x=-4±4√2(x+2)(x-5)=1x²-3x-10=1x&
114-9x1=-1x2=9/4再问:我忘记可以分为1和4了
x的平方-4x+4=(2x-1)²(x-2)²-(2x-1)²=0(x-2+2x-1)(x-2-2x+1)=0(3x-3)(-x-1)=0(x-1)(x+1)=0x=1或
x-1)(x-2)=0x=1ORx=2x1>x2x1=2,x2=1x1-2x=2-1=1
x^4-x^-2-x+1=x²(x²-1)-(x-1)=(x-1)[x²(x+1)-1】=(x-1)(x³+x²-1);
X^2+2x-1=0x=[-2±√(2^2+4)]/2=-1±√2X^2+2x-1=(x+1-√2)(x+1+√2)
(x1+x2)平方-4x1x2=x1²+2x1x2+x2²-4x1x2=x1²-2x1x2+x2²=(x1-x2)²(x平方+2)平方-(2x-1)平
inputx,yifx1,theny=1+2xprinty
第二问后面5x是x1还是x2再问:我再写一遍吧(1)求x1/x2+x2/x1;(2)求x1^2+5X2,是x2再答:
方程3x²-4x=-1可化为:3x²-4x+1=0由根与系数的关系,有x1+x2=4/3,x1x2=1/3∴x2/x1+x1/x2=(x1²+x2²)/(x1x
4x^2-(x-1)^2=03x^2+2x-1=0(3x-1)(x+1)=0
不等式左边=[2^x1+2^x2]/2>2根号(2^x1*2^x2)/2=根号2^(x1+x2){因为x1不等于x2,所以等号取不到}不等式右边=2^[(x1+x2)/2]=根号2^(x1+x2)得证
x1代入,1-m+n=0,m-n=1x2代入,4+2m+n=0,2m+n=-4解2元1次方程组,得到m=-1,n=-2m,n带入原方程,得到X²-x-2=0,因式分解(x-2)(x+1)=0
1/2x²-2x-3=x²-4x+4-4-6=(x-2)^2-10=0(X-2+根号10)(x-2-根号10)=0
x²-4x+4-2=0(x-2)²-2=0(x-2+√2)(x-2-√2)=0x=2-√2,x=2+√2再问:你看错题了吧再答:对的采纳再问:是x^2-4x+2=0不是x²
稍等.再答:再答:满意请采纳
9(x-1)^2=4(x+1)^29(x-1)²-4(x+1)²=0[3(x-1)+2(x+1)][3(x-1)-2(x+1)]=0(5x-1)(x-5)=05x-1=0或x-5=