Final answer:
To find the sum of -3x + 9 and 7x² - 2x + 1, combine like terms and simplify.
Step-by-step explanation:
To find the sum of -3x + 9 and 7x² - 2x + 1, we need to combine like terms. Like terms are terms that have the same variables raised to the same powers. In this case, we have -3x and -2x as our like terms. Combining these terms gives us -3x - 2x which simplifies to -5x. Similarly, we have 9 and 1 as our constants. Adding them gives us 10. Therefore, the sum of -3x + 9 and 7x² - 2x + 1 is 7x² - 5x + 10.
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