SOLUTION: The curve y=ax^3+2x^2+a^2x+b has a minimum point at (-1,0). Find a and b. So, how do i actually determine which one is correct for a? 1 or -4?

SOLUTION: The curve y=ax^3+2x^2+a^2x+b has a minimum point at (-1,0). Find a and b. So, how do i actually determine which one is correct for a? 1 or -4?

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Question 1044062: The curve y=ax^3+2x^2+a^2x+b has a minimum point at (-1,0). Find a and b.
So, how do i actually determine which one is correct for a? 1 or -4?
Answer by josgarithmetic(39616) (Show Source): You can put this solution on YOUR website!
What happens to the original equation if a is the positive value? What happens to the equation if a is the negative value? Do you think this might affect the maximum or minimum points of the curve?
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