（1）4（x-2）^2-（3x-1）^2=0 (2(x-2)+(3x-1))(2(x-2)-(3x-1))=0(5x-5)(-x-3)=0x=1 x=-3（2）x^2+5=2√5xx^2-2√5x+5=0(x-√5)^2=0x=√5(3)2x^2=7x-3^2 2x^2-7x+9=0(2x-9)(x+1)=0x=9/2 x=-1(4)4(x-1)^2=3(1-x)4(x-1...