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b. 4
c. 7
11.a. 9x
satu suku, var. : x , koef. : 9 konstanta : -
b. 3x^2 + 6y + 2 tiga suku, var. : x^2 dan y ; koef : 3 , 6 , konstanta : 2
12. a. 9k + 8m - 4km - 15k + 7km
suku sejenis : 9k , - 15k
-4km , 7km