October 2018 1 81 Report
13. Jumlah dari (7〖xy〗^2-9x^2 y+11xy) dan (5x^2 y-7xy-3xy^2 ) adalah
A. 4(xy^2-x^2 y+xy)
B. 4(xy^2+x^2 y-xy)
C. 2(xy^2-8x^2 y+4xy)
D. 12x^2 y-12xy^2+4xy


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