x²-36x+35=0 化简(x-1)×(x-35)=0 所以x=1或者35
(x-1)(x-35)=0x=1或x=35
(x-35)(x-1)=0x=35 x=1
x2-36x+35=0x2-36x=-35x2-36x+324=289(x-18)2=289x-18=正负 17x1=35 x2=1