Page 141 - Grade 10 C.Math

cyjf, x - 64 = 0
2
cyjf, (x- 8) (x + 8) = 0

cyjf, x- 8 = 0 jf x + 8 = 0

cyjf, x = 8, x = -8

Curriculum Development Centre
rflxPsf] ;ª\Vof ± 8 x'G5 .

pbfx/0f 2

olb s'g} b'O{ cf]6f j|mdfut wgfTds ;ª\Vofx¿sf] u'0fg kmn 600 5 eg] tL ;ª\Vofx¿ kTtf
nufpg'xf];\ .

;dfwfg

dfgf}F, tL b'O{ cf]6f j|mdfut ;ª\Vofx¿ x / x + 1 5g\ .

k|Zgfg';f/ M x(x+1) = 600
cyjf, x + x = 600
2
cyjf, x + x – 600 = 0
2
cyjf, x + 25x – 24x – 600 = 0
2
cyjf, x(x + 25) – 24(x + 25) = 0

cyjf, (x–24) (x+ 25) = 0
cyjf, x - 24 = 0, x + 25 = 0

cyjf, x = 24, –25

wgfTds ;ª\Vofx¿ dfq lnFbf

x = 24 / x + 1 = 25 x'G5 .

To;}n] tL ;ª\Vofx¿ 24 / 25 x'g\ .

pbfx/0f 3
2 cª\ssf] Pp6f ;ª\Vof To;df ePsf cª\sx¿sf] of]ukmnsf] 5 u'0ff 5 . olb cª\sx¿sf] u'0fg
kmn 20 eP pSt ;ª\Vof slt x'G5 < kTtf nufpg'xf];\ .

;dfwfg

dfgf}F, b'O{ cª\ssf] ;ª\Vof 10x + y 5 . hxfF x / y j|mdzM b; / Pssf] :yfgdf /x]sf cª\sx¿
x'g\ .

138 ul0ft, sIff – 10