换成一般式:-x^2+7x-6=0
两边同时乘-1得:
x^2-7x+6=0
因式分解得:
(x-1)*(x-6)=0
解得:x=6和x=1
7x-x²=6
x²-7x+6=0
(x-1)(x-6)=0
x1=0, x2=6
7x-x^2=6
-x^2+7x-6=0
x^2-7x+6=0
(x-1)(x-6)=0
x1=1 x2=6
7x-x²=6
解:x²-7x+6=0
(x-1)(x-6)=0
x-1=0 x-6=0
x1=1 x2=6
用十字相乘法:
x-7x²+6 =0
(x-6)(x-1)=0
x1=6 x2=1