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2. c. 3x²y dan 4xy²
3. 4( 2x²+x+5 ) - 2( x² + 6 )
= 8x² + 4x + 20 - 2x² - 12
= 6x² + 4x + 8 (a)
4. 4a²b - 2ab
= 2ab ( 2a - b² ) (b)
5. a. 3/x ( untuk no ini ga yakin sih )
6. x/3 + x/2 jadikan 6
= 2x/6 + 3x/6
= 5x/6