∵(70-x)x=384==>70x-x²=384==>x²-70x=-384==>x²-70x+35²=35²-384==>(x-35)²=841==>x-35=±29==>x=35±29∴x1=35+29=64,x2=35-29=6故原方程的解是：x1=64,x2=6