Respuesta :

Noctnel
Assuming the questions asks to add the equations together:

(i) -3x^2y

3x^2y + (-5x^2y) + (-x^2y)
= 3x^2y - 5x^2y - 1x^2y
= -3x^2y

(ii) 3a + 2b - 4

a + b - 3 + b + 2a - 1
= 3a + 2b - 4

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