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  3. 1   dk ;ksT; çfrykse gksxk  (i) x (ii) - 1  (iii)  –  x (iv) x + 1  4. O;atdksa 4 x  vkSj 4 xy 2  dk y0 l0 gS&  (i) 4 (ii) 4x (iii) 4xy (iv) 4xy 2  5.   5  = 20 dk gy gS&  (i) ± 5 (ii) ± 10 (iii) ± 20 (iv) ± 2 ç02 & vfr y?kq mRrjh; ç'u 1-     −   (+  )   dks fuEure inks esa O;Dr djks  2-   +2−2  + −2+2   dk ;ksx Kkr djks  3-     −9+2  ,   −4+3   dk xq.kuQy Kkr djks  4-   9  –   x 2  vkSj  x 2  + 4x+ 3 cgqinksa dk e0l0 Kkr djks  5-   (x 2 - 9), (x 3  + 27) dk y0 l0 Kkr djksA   ç'u 3& y?kq mRrjh; ç'u 1& 5(x-5) (x+5) = 55 dks xq.ku[kaM }kjk leh0 dks gy djksA 2& 3x2 + 2x  –   1 = 0 ds fofodrdj Kkr djksA 3& mu nks Øekxr /ku fo ke iw.kkZadks dks Kkr dhft, ftuds oxksZa dk ;ksx 130 gSA 4& fdlh foÙkh; o kZ esa MsfoM dh okf kZd vk; 3]60]000 #0 FkhA mlus lkekU; Hkfo ; fuf/k [kkrs esa 7]200 #0 çfrekg tek fd, MsfoM }kjk ns; vk;dj dh x.kuk djks tcfd cpr ij NwV dh vf/kdre lhek ,d yk[k #0 Fkh vk;dj dh njsa fuEuor gSa& 1& 1]50]000 #0 rd 'kwU;   2& 1]50]000 #0 ls 3]00]000 #0 rd 1]50]000 #0 ls vf/kd jkf'k ij 10 %  blds vfrfjDr vk;dj ij 3 % vf/kHkkj yxrk gSA 5& uhyek 1]320 #0 dh ,d lkbZfdy [kjhnrh gSA ftlesa foØhdj Hkh 'kkfey gSA ;fn fcØhdj dh nj 10 % gks rks lkbZfdy dk foØh ewY; Kkr djksA ç'u &4 nh?kZ mÙkjh; ç'u 1& ,d O;fDr ,d okf'kax e'khu 6510 #0 esa [kjhnrk gSA blesa O;kikj dj lfEefyr gSA ;fn O;kikj dj dh nj 5 % gks rks okf'kax e'khu dk vafdr ewY; Kkr djks \ 2& ;fn la[;kvksa 27, 23, (x-4), 15, 3, (x+4) rFkk 7  dk lekUrj ek/; 15  gks rks  x  dk eku Kkr djks \   3& fuEufyf[kr lkj.kh ls ef/;dk Kkr djks& in 20 25 30 35 40 50 vko`fÙk 3 5 12 6 4 1 4& 15 eh0 yEckbZ 12 eh0 pkSM+kbZ ds ,d dejs ds pkjksa vksj ,d 90 oxZ eh0 dk cjkenk gSA cjkens dh pkSM+kbZ Kkr djks \ 5& 2 4  & 10 2  $ 9 ¾ 0 dks lekuhr djds gy djks \
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