SubArea: Higher degree equations and inequalitiesLevel: AProject ID: 1003028802Accepted: 1Find the sum of all the real roots of the next equation. Multiple roots, if any, count only once. \[ \left(x^2+9\right)\left(x^2-1\right)\left(x+1\right)=0 \]\( 0 \)\( 1 \)\( -1 \)\( 3 \)
