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#1**+2 **

Here is the graph of it: https://www.desmos.com/calculator/ox7g6zpagq

Notice that it comes down to a point twice, meaning it has 2 relative minimums.

AdamTaurus Nov 14, 2017

#3**+1 **

x^4 - 10x^2 + 9

Taking the derivative, we have that

4x^3 - 20x = 0 factoring, we have that

4x ( x^2 - 5) = 0

Setting each factor to 0 and solving for x produces

x = 0, x = √ 5, x = - √ 5

Taking the second derivative, we have

12x^2 - 20

Putting 0 into this produces a negative...so this is a relative max at x =0

Subbing the othertwo values into the second derivative produces positives...so....we have absolute minimums at x = ±√5

CPhill Nov 14, 2017