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OpenStudy (blaque678):
f(x) =-x^ 4 + 6x^2 + 5 (hint let t=x^2) 13,7,15,9 or 14?
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Directrix (directrix):
@blaque678 If the task is to find the roots (x-intercepts) of f(x), then 0 = -x^ 4 + 6x^2 + 5 has no integer roots. All of these --> 13,7,15,9 or 14? are incorrect.
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