Question

抛物线y=ax²+bx+c与x轴的两交点的横坐标分别是-1/2,3/2与y轴交点的纵坐标是-5

Answer 1

（-1/2,0) ,(3/2,0) (0,-5)

y=a(x+1/2)(x-3/2)

-5=a(0+1/2)(0-3/2)=-3/4a

a=5*4/3=20/3

y=20/3(x+1/2)(x-3/2)