Question

17x² + 25 + (-2x) - 16x² - 30​

Answer 1

17x² + 25 + (-2x) - 16x² - 30
Isolate like terms:
17x² - 16x² = x²
25 - 30 = -5
+ (-2x) = -2x
Put together in standard form:

x² - 2x - 5