Respuesta :

Answer:

-5x^4+7x^2

Combine like terms to simplify

Answer:

-5x^2+7x^2

Step-by-step explanation:

3x^4-5x+7x^2-8x^4+5x

3x^4-8x^4-5x+5x+7x^2

-5x^4+7x^2

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