Page 115 - Grade 10 C.Math

;dfwfg

√48a b + √243a b − √1875a b
= √2 × 2 × 2 × 2 × 3a × b × b + √3 × 3 × 3 × 3 × 3a × b × b − √3 × 5 × 5 × 5 × 5a × b × b
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2

= 2ab 3b + 3ab 3b − 5ab 3b

Curriculum Development Centre

= (2ab + 3ab − 5ab) 3b

= 0 3b = 0

2
s] √5 = √5 × √5 = √25 x'G5 <

]

3

olb 2 = 8 x'G5 eg s] 2 = √8 = √2 × √2 × √2 n]Vg ;lsG5 < 5nkmn ug'{xf];\ .

;8{x¿sf] u'0fg lj|mof ug{ ;8{x¿sf] j|md Pp6} x'g'k5{ . d"n lrxgleqsf] kl/df0f
\
Pp6} jf km/s klg x'g ;S5 .

3
3. u'0fg ugxf];\ M -s_ √2 × √7 -v_ √2 × √2
'{
;dfwfg
-s_ √2 × √7 = √2 × 7 = √14

-v_√2 × √2 = √2 × √2 -2 / 3 sf] n=;= = 6_

= √8 × 4

= √32 [2 = 8, 2 = 4]

;8{x¿sf] efu lj|mofdf ;8{x¿sf] j|md Pp6} x'g'k5{ . d"n lrxgleqsf] kl/df0f
\
Pp6} jf km/s klg x'g ;S5 .

4. ;/n ug'{xf];\ M √a b c ÷ √81a b c

;dfwfg

a b c ÷ 81a b c

112 ul0ft, sIff – 10