(x+5)(x-9)=0怎么算?
问题描述:
(x+5)(x-9)=0怎么算?
答
(x+5)(x-9)=0
x+5=0x=-5
x-9=0 x=9
(x+5)(x-9)=0怎么算?
(x+5)(x-9)=0
x+5=0x=-5
x-9=0 x=9