Question

2x*2-5x+1=0要过程（用配方法解）

Answer 1

2(x^2-5/2x+25/16)+1-25/8=0

2(x^2-5/2x+25/16)-17/8=0

2(x-5/4)^2=17/8

（x-5/4）^2=17/16

x-5/4=±√(17)/4

x=±√(17)/4+5/4