第1个回答 2011-07-14
将原试化为x^2-(3/2)x=-1/2, 进行配方为x^2-(3/2)x+(3/4)^2=-1/2+(3/4)^2变为(x-(3/4))^2=1/16然后就是开方取解了
第2个回答 2011-07-14
2x^2+1=3x
x^2-3/2x+1/2=0
(x-3/4)^2-9/16+1/2=0
(x-3/4)^2-1/16=0
(x-3/4+1/4)(x-3/4-1/4)=0
(x-1/2)(x-1)=0
x1=1/2 x2=1本回答被提问者采纳
第3个回答 2011-07-14
x^2-3/2x=-1/2
(x-3/4)^2=9/16-1/2
(x-3/4)^2=1/16
x-3/4=±1/4
x=1 x=1/2