November 2018 2 37 Report
Hasil pengurangan dari (a2 – ab – b2) dari (b2 + ab – 3a2) adalah ....
Select one:
a. 2b2 + 2ab – 4a2
b. 4a2 + 2ab
c. 2b2 – 2ab + 4a2
d. – 4a2

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