Respuesta :

To subtract two polynomials, we have to combine similar terms, as follows:

(5y³ + 5y² - y - 12) - (y² - 9y + 1) =

= 5y³ + 5y² - y - 12 - y² + 9y - 1 =

= 5y³ + (5y² - y²) + (-y + 9y) + (-12 - 1) =

= 5y³ + 4y² + 8y - 13

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