Respuesta :

The standard form of the expanded polynomial, is expressed as: 7r² - 6r - 9.

What is the Standard Form of a Polynomial?

The standard form of a polynomial is expressed by writing the term with the highest exponent or power first, while the constant is written last.

Given the polynomial:

(8r² - 7r - 9) + (-r² + r)

Distribute to open the bracket

8r² - 7r - 9 - r² + r

Combine like terms

7r² - 6r - 9 (standard form)

Learn more about the standard form of a polynomial on:

https://brainly.com/question/14021428

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