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= 8p+3p-3+8
= 11p+5
b.) 9m+4mn+(-12m)-7mn
= 9m-12m+4mn-7mn
= -3m-3mn
2.c.) 2(-8a-3b)-4a+9b
= -16a-6b-4a+9b
= -16a-4a-6b+9b
= -29a+3b
jadikan jawaban terbaik pliss..