Question

开口向下的抛物线y=mx^2-2x+m(m-2)与y轴的交点是(0,3),则它与x轴交点是____

Answer 1

x=0,y=3

3=0-0+m(m-2)

m²-2m-3=(m-3)(m+1)=0

开口向下则m