Question

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Answer 1

Explicação passo-a-passo:

1) 7x³+5b²-5x³-2b²= 2x³ +3b²

2) 3x²+2y³+x²+4y³= 4x²+6y³

3) 3x +3y

4) xb²- xd³

5) 12p³m+ 18pm⁴

6) x² +xy +xy +y²= x² +2xy +y²

7) c² - cd + cd - d²= c² - d²