4(x-2)²-(x-1)²=0
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4(x-2)²-(x-1)²=0
3x²-2-2倍根号3=0 x²+5=2倍根号5x x²+ax-2a²=0
3x²-2-2倍根号3=0 x²+5=2倍根号5x x²+ax-2a²=0
4(x-2)²-(x-1)²=0
[2(x-2)-(x-1)][2(x-2)+(x-1)]=0
(2x-4-x+1)(2x-4+x-1)=0
(x-3)(3x-5)=0
x=3或x=5/3
3x²-2-2倍根号3=0
3x平方=2+2√3
题目有误吧
x²+5=2倍根号5x
x平方-2√5x+(√5)平方=0
(x-√5)平方=0
x1,2=√5
x²+ax-2a²=0
(x-a)(x+2a)=0
x=a或x=-2a
[2(x-2)-(x-1)][2(x-2)+(x-1)]=0
(2x-4-x+1)(2x-4+x-1)=0
(x-3)(3x-5)=0
x=3或x=5/3
3x²-2-2倍根号3=0
3x平方=2+2√3
题目有误吧
x²+5=2倍根号5x
x平方-2√5x+(√5)平方=0
(x-√5)平方=0
x1,2=√5
x²+ax-2a²=0
(x-a)(x+2a)=0
x=a或x=-2a
解方程 x(x+1)(x²-2x-4)=0 x³-2x+1=0 x的4次方+8x³+14x
设f (x)={2x+1(x≥0),x²+4(x
解方程(x²-x+4)x-(x-1)(x²+2)=x+7
(x+2)/x(x-2)-(x-1)/x²-4x+4=几,
已知函数f(x)=x²+x+1,x≥0;2x+1,x
已知f(x)={x²-3x+4(x>0),{1-x(x
因为x²-x+2=(x-1/2)²+7/4>0所以x(x²-x+2)
x²+3x-2=0,x²-6x-6=0,3x²-4x-1=0,3x²+10x+3
(x-2)²=(2x-3)² x²-4x=0 3x(x+1)=3x+3 x²-2
3x²-(x-2)=0 (2x-1)(x+3)=4 x²-3x-4=0 x²-3x+18=
2x(x-1)=0 x²+4=4x (x-3)(x+1)=0 x²-3x+1=0
(X-1)(X-2)=70,(3-X)²+2X(X-1)=0,-3X²-4X+4=0,(3-X)