配方法
2x²+6=7x
x^2-7/2x+3=0
(x-7/4)^2+3-49/16=0
(x-7/4)^2-1/16=0
(x-7/4+1/4)(x-7/4-1/4)=0
(x-3/2)(x-2)=0
x1=3/2 x2=2
2 x² -7x+6=0
(2x-3)*(x-2)=0
2x-3=0
x=3/2
x-2=0
x=2
方程的解是x=3/2或x=2
2x²-7x+6=0
(2x-3)(x-2)=0
x=3/2或x=2
2x²+6=7x
2x²-7x+6=0
(x-3)(2x-1)
x=3 或 x=1/2.
2或3/2