− − ! − " − # − $%&'(' ") " " ) " − ! * ! − #+,'- +.&/%0%&12 342 " ! 5 ) '-'6 #) '- !+.&/$%0$%&7'& 0")" − ) 8* #809) " ! − ": ! " '3;)<=31=>% ? ! 5 " " 5 # ! ? @/.7ABC a 2 b 3 )1D EAD8 5 5 − − #FG<HG/ !"#$% 'BI+J " 9 a − " 5 ? 9 9 5 b + − ! 9 ! ? 5 ? c + − ÷ 'BI+KILA< ! a x − = 5 9 M " " b x = " ? 0" 9 c x − = 'BI&ABCD MMM ? 5 + + + + + C4N &'()* +, - . / 0 121 3 4 3 3 !"#$% 'BI+J " 9 5 ! ! a − − − = = " 5 ? " 5 ? 9 9 5 9 ! 5 ! ? 5 ? ! 5 5 5 5 b + − = + − = − = − = ! "9 9 ! ? 5 ? ? 5 ? "9 ? ? "9 " ? ? " " !5 ! ? 5 c + − = + − ÷ ÷ − = + = − − = = = 'BI+KILA< ! !M M !9 ! a x x x − = ⇔ − = ⇔ = = − − 5 9 9 5 M " " " " 9 " M " 5 " b x x x = ⇔ = ⇔ = = " ? " ? 0" 9 9 9 " ? 9 9 " " c x x x x − = ⇔ − = ⇔ = + = ⇔ = = 'BI +&D MMM M M M MMM M M ? 5 ! ! " 9 5 5 ! MMM 0! ! ! " 9 5 5 + + + + + = + + + + + = − + − + − + + − − − = − = = < OPN 3 +.&/%0$%&12 ! 342 " ? #0 0'-'6 !− ?− ! 9 − !− # ?− +Q'RC"M9D!M0S%'3;/$%%&'(T " ! 9 = 9 ! " = " ! 9 = #0 0'-'6 !/$%%&'(7'& 09)9 − ) " 0!* − − #8) ": " ! '3;)<=31=>% " ! 5 ! # ! @/.7ABC a 2 b 3 )1D EAD8 " − " − " − # ! " − !"#$% 'BI+J ! 9 a − " 9 " ? ? 5 b + − ? " 5 5 c + − ÷ 'BI+KILA< 9! a x − = ! 9 M " " b x = ! 5 M 0" ? 9 c x + = 'BI&ABC D !M? ?M M M M5 + + + + C4.U N ! &'()* +, - . / 0 121 4 4 4 4 4 !"#$% 'BI+J ! 9 " 9 9 a − − = = " 9 9 " ? ? 5 ? ? 5 ? 9 5 9 ? 5 5 5 5 b + − = + − = − = − = ? ? " " 5 5 5 5 ? ? ! c + − = − + ÷ ÷ = + = 'BI+KILA< M M9! 9! " ? a x x x − = ⇔ − = ⇔ = = − − ! 9 9 ! M " " " " 9 " M " ! b x x x = ⇔ = ⇔ = = ! 5 ! 5 M 0" M ? 9 ? 9 9 ! 5 M ? 9 9 ! ? ? ! ! c x x x x + = ⇔ + = ⇔ = − = ⇔ = = = 'BI & D !M? ?M M M M5 ! ? ? 5 " " ! 5 ? Ta + + + + = − + − + − + − + − = − = < C4.U N ! . − #+,'- +.&/%0%&12 342 " ! 5 ) '-&apos ;6 #) '- !+.&/$%0$%&7'& 0")". < OPN 3 +.&/%0$%&12 ! 342 " ? #0 0'-&apos ;6 !− ?− ! 9 − !− # ?− +Q'RC"M9D!M0S%'3;/$%%&'(T . ! 9 − !− # ?− +Q'RC"M9D!M0S%'3;/$%%&'(T " ! 9 = 9 ! " = " ! 9 = #0 0'-&apos ;6 !/$%%&'(7'& 09)9