May 2021 2 53 Report
expressões algébricas ?

(4b+3c-a) +(4a-3b-20)

(xy-3x²+1)+(3+5x²13 xy)

(10x 20y)- ( 5x + 15y)

(5a) (-7c)

(-5xy³) (-7x³y)

Alguém poderia me explicar como fazer essas contas ?

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