(ax+b)(cx-d)=0(a,b,c,d是常数,a不等于0,c不等于0)
问题描述:
(ax+b)(cx-d)=0(a,b,c,d是常数,a不等于0,c不等于0)
答
(ax+b)(cx-d)=0
ax+b=0或cx-d=0
x=-b/a,x=d-c