sasogeek
what are the zeros of \(\large f(x) = x^4  16 \)



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saifoo.khan
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x^4 = 16.
Taking quad* root on both sides..

hcmathkim
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2 and 2

Hero
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take 4th root of both sides, not quad root

sasogeek
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hcmathkim, please don't answer snipe... especially with me :) thanks

saifoo.khan
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2
dw:1354760904793:dw

hcmathkim
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Set f(x) =0. 0 = (x^2 + 4) (x^2  4) = (x^2+4)(x+2)(x2) . (x^2+4) > 0 always so x=2, 2