Final answer:
To perform the operation, we need to combine like terms and simplify the expression. The result is 6x² - 12x + 16.
Step-by-step explanation:
To perform the operation given, we need to combine like terms and simplify the expression.
Starting with the subtraction, distribute the negative sign to every term inside the bracket:
10x² - 7x + 7 - 4x² - 5x + 9
Combining like terms, we get:
(10x² - 4x²) + (-7x - 5x) + (7 + 9)
= 6x² - 12x + 16
Therefore, the result of the operation is 6x² - 12x + 16.
Learn more about Combining like terms and simplifying expressions