Question

Write a cubic function that passes through the points (-3,0), (0,0), (1,-8), (2,0)

Answer 1

Answer:
y=2x^3+2x^2-6x
Explanation:
y=k（x+3）(x-2) x
∵（1，-8）
∴ -8 = k（1+3）（1-2）1
∴ k=2
∴y=2（x+3）（x-2）x=2x^3+2x^2-6x