A) If this cubic function has a turning point at (a, 0), that suggests to me thatais a repeating root and has an even multiplicity. (b, 0) is the other root, and since this is cubic,ahas a multiplicity of 2, so this polynomial would be

(Normally, I would use the variableain front instead ofd, butais already used as one of the roots.)

The y-intercept is , or :

d = 1, so the leading coefficient of this cubic is 1:

EDIT: Cleaned this up because I can't read.

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