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²log3 = x
²log 25 = y --> ²log 5² = y --> ²log 5 = 1/2 y
²log 45√3 = ²log 45 + ²log √3
= ²log 3² + ²log 5 + ²log 3^(1/2)
= 2. (²log 3) + (²log 5) + 1/2 (²log 3)
= 2 x + 1/2 y + 1/2 x
= 5/2 x + 1/2 y
= 1/2 (5x + y)
31) | m | > 2
m >2 atau -m > 2
m > 2 atau m < - 2