解方程:(y-3y+2)(y+3y-2)=y(y+3)(y-3)
问题描述:
解方程:(y-3y+2)(y+3y-2)=y(y+3)(y-3)
答
(y-3y+2)(y+3y-2)=[y^ 2-(3y-2)](y^ 2+3y-2)=y^ 4-(3y-2)^ 2=y^ 2(y^ 2-9) 化简得12y-4=0,解得y=1/3
解方程:(y-3y+2)(y+3y-2)=y(y+3)(y-3)
(y-3y+2)(y+3y-2)=[y^ 2-(3y-2)](y^ 2+3y-2)=y^ 4-(3y-2)^ 2=y^ 2(y^ 2-9) 化简得12y-4=0,解得y=1/3