Toán Lớp 9: A=1- √7+(2 √6)
B= √7-(2 √12)
C= √2x+(2 √2x-1)
D= √117 ²-108 ²
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Toán Lớp 9: A=1- √7+(2 √6)
B= √7-(2 √12)
C= √2x+(2 √2x-1)
D= √117 ²-108 ²
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