Question

(a)7x²+2x²-6x²=


(b)2ab+1,5ab-2,3ab=



(c)-3,1x²y+4,5x²y-2,7x²y=




(d)10bc-12bc+7bc-3bc=

como resolvo?


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Answer 1

A) 7x²+2x²-6x² = (7+2-6)x² = 3x²

B) 2ab+1,5ab-2,3ab = (2+1,5-2,3)ab = 1,2ab

C) -3,1x²y+4,5x²y-2,7x²y = (-3,1+4,5-2,7)x²y = -1,3x²y

D) 10bc-12bc+7bc-3bc = (10-12+7-3)bc = 2bc

Espero que tenha sido útil! ^^