izzyc789
izzyc789
23-11-2014
Mathematics
contestada
Factor completely
x^4 -81
Respuesta :
konrad509
konrad509
23-11-2014
[tex]x^4-81=\\ (x^2-9)(x^2+9)=\\ (x-3)(x+3)(x^2+9) [/tex]
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