Page 140 - Grade 10 C.Math

(b) Pp6f leGgsf] c+znfO{ 3 n] u'0fg u/L x/af6 2 36fOof] eg] glthf 3 x'G5 . olb ;f]
leGgsf] c+zdf 4 hf]8L x/nfO{ bf]Aa/ u/L 2 36fpFbf glthf 1 x'G5 eg] pSt leGg
kTtf nufpg'xf];\ .
5. (a) olb ltg jif{cl3 Ps hgf afa' / pgsf] 5f]/fsf] pd]/sf] of]ukmn 48 jif{ lyof] . casf]
ltg jif{kl5 p;sf] afa' / 5f]/fsf] pd]/sf] cg'kft 3:1 x'G5 . xfnsf] afa' / 5f]/fsf] pd]/
Curriculum Development Centre
slt xf]nf < kTtf nufpg'xf];\ .

(b) b'O{ hgf ljb\ofyL{x¿sf] xfn pd]/sf] cg'kft 5:7 5 . olb cf7 jif{cl3 pgLx¿sf] pd]/sf]
cg'kft 7:13 lyof] eg] xfnsf] pd]/ slt slt x'G5 < kTtf nufpg'xf];\ .
6. (a) b'O{ cª\sn] ag]sf] Pp6f ;ª\Vofdf cª\sx¿sf] of]ukmn 8 5 . olb ;f] ;ª\Vofdf 18 36fOof]
eg cªsx¿sf :yfg ablnG5 . pSt ;ªVof slt xG5 < kTtf nufpgxf; .
'
'
\
]
\
]
]
\
(b) b'O{ cª\ssf] Pp6f s'g} ;ª\Vof To;sf cª\sx¿sf] of]ukmnsf] 6 u'0ff 5 . olb Tof]
;ª\Vofaf6 9 36fOof] eg] To;sf cª\sx¿sf] :yfg ablnG5 . Tof] ;ª\Vof slt xf],
kTtf nufpg'xf];\ .
7. ahf/df ePsf s'g} b'O{ cf]6f pkef]Uo ;dfgx¿sf] PsfO d"No ;f]Wg'xf];\ . tL PsfO
d"Nosf cfwf/df o'ukt\ /]vLo ;dLs/0fsf 2 cf]6f zflAbs ;d:ofx¿ agfO{ xn
ug'{xf];\ .

12.2 ju{ ;dLs/0fsf zflAbs ;d:ofx¿ (Verbal Problems on Quadra c Equa on)

lbOPsf zflAbs ;d:ofx¿nfO{ r/ /fzL k|of]uaf6 ul0ftLo jfSodf kl/0ft u/L v08Ls/0f cyjf

{
|
"
2
{
]
{
x , (ax + bx + c = 0) a 0 ;q kofu u/L ju ;dLs/0fnfO xn ug ;lsG5 . ju{
;dLs/0f ;DaGwL zflAbs ;d:ofx¿ ;dfwfgsf ;DaGwdf tn lbOPsf pbfx/0fx¿ cWoog
ug'{xf];\ M
pbfx/0f 1
olb Pp6f ;ª\Vofsf] ju{af6 3 36fpFbf 61 afFsL x'G5 eg] pSt ;ª\Vof slt xf]nf, kTtf
nufpg'xf];\ .

;dfwfg

dfgf}F, pSt ;ª\Vof x 5 .
k|Zgfg';f/ x – 3 = 61
2
2
cyjf, x = 64

137 ul0ft, sIff – 10