问题:
下列给出a、b、c的各组值中,使代数式b 2-4ac的值是16的是
A.-1,-2,3
B.-1,-2,-3
C.1,2,3
D.-1,2,-3
下列给出a、b、c的各组值中,使代数式b 2-4ac的值是16的是
A.-1,-2,3
B.-1,-2,-3
C.1,2,3
D.-1,2,-3
A.-1,-2,3
B.-1,-2,-3
C.1,2,3
D.-1,2,-3
参考答案: