SOLUTION: I have to find the zeros of the one part of the equation, which is r^4-13r^2+36 Now, after factoring by grouping, I got that the zeros are -3, -2, 2, and 3. But the closest choi

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Question 844371: I have to find the zeros of the one part of the equation, which is r^4-13r^2+36
Now, after factoring by grouping, I got that the zeros are -3, -2, 2, and 3. But the closest choice on my multiple choice homework doesn't show that as an option, the closest one is what I got, but also a zero. Did I do something wrong or am I missing something that a zero is one of the zeros of the equation?
Answer by ewatrrr(24785)   (Show Source): You can put this solution on YOUR website!
 

Hi,

r^4-13r^2+36 has at most 4 real roots:  they are -3, -2, 2, 3



 

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