2010009707
Část:
A
Určete součinový tvar rovnice.
\[ x^4-81=0 \]
\( \left(x^2+9\right)\left(x-3\right)\left(x+3\right)=0 \)
\( \left(x-3\right)^2\left(x+3\right)^2=0 \)
\( \left(x-3\right)^4=0 \)
\( \left(x+9\right)\left(x-3\right)\left(x+3\right)=0 \)