SOLUTION: I would appreciate any help walking me through this homework question that I have. Find all real zeros of the functions listed below. * f(x)=-7x^4+343x^2 * f(x)=x^4-16x^2+15

SOLUTION: I would appreciate any help walking me through this homework question that I have. Find all real zeros of the functions listed below. * f(x)=-7x^4+343x^2 * f(x)=x^4-16x^2+15

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Question 87620: I would appreciate any help walking me through this homework question that I have.
Find all real zeros of the functions listed below.
* f(x)=-7x^4+343x^2
* f(x)=x^4-16x^2+15
Answer by longjonsilver(2297) (Show Source): You can put this solution on YOUR website!
1.

2. think of as where . You can factorise this quadratic in y by looking and then re-write y as x^2 for each solution and find out what x is for each.

cheers
Jon

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