2x²-3x-6=0
x² - 3/2 x - 3 =0
x² - 3/2 x + 9/16 = 3 + 9/16
(x -3/4)² = 57/16
x -3/4 = ±√57 /4
x = (3±√57) / 46x的平方-5x-3=05x的平方-2=-x8x的平方-8x+1=0先将二次项系数变成 1，后面就是一样的操作了求过程和解答~6x²-5x-3=0x²-5/6 x-1/2=0(x-5/12)²=97/144 x=(5±√97)/125x²+x-2=0 x²+x/5-2/5=0 (x+1/10)²=41/100x=(-1±√41)/108x²-8x+1=0 x²-x+1/8=0(x-1/2)²=1/8 x=(2±√2)/4