Page 56 - Grade 10 C.Math

lqe'hsf] If]qkmn

cyjf,

cyjf, [b + c = 11]

cyjf,
Curriculum Development Centre
cyjf, (6) = 2(10b – b – 10 + b) [ b'j}tk{m ju{ ubf{]
2
2
cyjf, 36 = 2(-b + 11b - 10)
2
cyjf, 18 = -b + 11b - 10
2
cyjf, 18 + b – 11b + 10 = 0
2
cyjf, b – 11b + 28 = 0
2
2
cyjf, b – 4b – 7b + 28 = 0
cyjf, b(b – 4) – 7(b - 4) = 0

cyjf (b – 4) (b – 7) = 0
cyjf, b - 4 = 0 cyjf, b - 7 = 0

 b = 4 cyjf b = 7
b sf] dfg b + c = 11 df k|lt:yfkg ubf{

c = 11 - 4 = 7 cyjf c = 11 - 7 = 4
t;y{ afFsL e'hfx¿sf] dfg 4 ;]=ld= / 7 ;]=ld= x'G5 .

cEof; 5.1

1. lbOPsf lrqx¿sf] If]qkmn lgsfNg'xf];\ M
(a) A (b) A (c) A

5 ;]=ld=

B C B C B C
4 ;]=ld= D 5 ;]=ld= 3 ;]=ld=
(d) (e) A (f)
A A

B D

7.5 ;]=ld=
B C C B
4.5 ;]=ld= 12 ;]=ld= C

53 ul0ft, sIff – 10