(1).2x^2-3x+1=0 (2).x^2-2倍根号3x+3=0 (3).3x^2-1=4x (4).2倍根号3x-根号2（x_数学解答

(1).2x^2-3x+1=0 (2).x^2-2倍根号3x+3=0 (3).3x^2-1=4x (4).2倍根号3x-根号2（x^2+1)=0用公式法怎么解

人气：422 ℃　时间：2019-08-19 05:31:33

解答

2x^2-3x+1=0(2x-1)(x-1)=0x=1/2或x=1x^2-2√3x+3=0x^2-2√3x+(√3)^2=0(x-√3)^2=0x=√33x^2-1=4x3x^2-4x-1=0x^2-4x/3-1/3=0x^2-4x/3+4/9-4/9-1/3=0=0(x-2/3)^2-7/9=0(x-2/3-√7/3)(x-2/3+√7/3)=0x=2/3+√7/3或x=2/...