1.4(x-2)²-(3x-1)²=0
4(x²-4x+4)-(9x²-6x+1)=0
-5x²-10x+15=0
x²+2x-3=0
(x+3)(x-1)=0
x=-3或x=1
2.(2x-1)²+3(2x-1)+2=0
4x²-4x+1+6x-3+2=0
4x²+2x=0
2x(2x+1)=0
x=0x=-1/2
3.x²+5=2根号5x
(x²+5)²=4*5x²
x的4次方+10x²+25=20x²
x的4次方-10x²+25=0
(x²-5)²=0
x²=5
x=±根号5
4.根号3x²-x-2根号3=0此题弄不清意思
5.4X(1-x)=1
4x-4x²=1
4x²-4x+1=0
(2x-1)²=0
2x=1
x=1/2