Jawabanmu

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2014-09-10T17:24:21+07:00
Hasilnya = -19

2/3 akar 7 dikali 2/3 akar 7 per 2/3 akar 7
= 6 akar 7 per 9 x 7
= ( 6 : 9 = 2 : 3 ) 2 akar 7 per 3 x 7 akar 7
= 2 akar 7 per 21 akar 7.

a/b akar 7 = 2/21 akar 7
a= 2
b= 21
a-b= 2-21 = -19