(1)当两根互为相反数时系数a、b、c应满足的条件是
b²-4ac≥0,且b=0
(考虑两根的和为0即可)
(2)当两根互为倒数时系数a、b、c应满足的条件是
b²-4ac≥0,且a=c
(考虑两根的积为1即可)