Page 116 - Grade 10 C.Math

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Curriculum Development Centre

c a b c
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3 3
5. ;/n ug'{xf];\ M √ − √ √ + √

;dfwfg

3√a − 2√x 2√a + 3√x

= 3√a 2√a + 3√x − 2√x(2√a + 3√x)

= 6√a × a + 9√a × x − 4√x × a − 2 × 3√x × x

= 6a + 9√ax − 4√ax − 6x

= 6a − 6x + 5√ax

cEof; 9.2

1. ;/n ug'{xf];\ M

-s_ 4√2 + 5√2 + 7√2 -v_ 5√7 + 8√7 + 5√7

-u_ 25√192 + 45√192 + 20√192 -3_ 25√37 + 251√37 + 49√37
2. ;/n ug'{xf];\ M
-s_ √45 + √245 − √500 + √625

-v_7√16 + 2√54 + 3√128 − 4√250

-u_2√72 − 5√18 + 3√98
3. u'0fg ugxf];\ M
'{
-s_ √2 × √5 -v_ √3 × √11

ul0ft, sIff – 10 113