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Answer :

Ghaithghgo

Answer:

[tex](f - g)(x) = {x}^{2} + 8x + 1[/tex]

Step-by-step explanation:

[tex](f - g)(x) = f(x) - g(x) \\ = (3 {x}^{2} + 7x) - (2 {x}^{2} - x - 1) \\ = (3 {x}^{2} + 7x) + ( - 2 {x}^{2} + x + 1) \\ = {x}^{2} + 8x + 1[/tex]

I hope I helped you^_^

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