October 2018 2 485 Report
18. Bentuk paling sederhana dari: 7x(x-y+2)- 5x(x-2y-1 adalah . . . .
A. 2x^2+3xy+19x
B. 2x^2+17xy+19x
C. 2x^2-3xy+9x
D. -3x^2+17xy+9x

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