Question

Me ajudem por favor
Simplifique as expressões:
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Answer 1

a. 5XY + 15xy - 12XY + 2XY

20xy - 10xy

10xy

b. - 1/3 xy + 4/9 xy - 1/9 xy

(- 1/3 + 4/9 - 1/9). xy

(- 3/9 + 4/9 - 1/9). xy = 0. xy = 0

c. 9x^4y³ - 18x^4y³ - 10x^4y³ + 2x^4y³ =

(9 - 18 - 10 + 2). x ^ 4y³ = - 17x^4y³