Final answer:
To evaluate f(-5), substitute -5 for x in the given function. f(-5) = 270.
Step-by-step explanation:
To evaluate f(-5), substitute -5 for x in the given function.
f(x) = 10x² - 4x
f(-5) = 10(-5)² - 4(-5)
f(-5) = 10(25) + 20
f(-5) = 250 + 20
f(-5) = 270
Therefore, f(-5) = 270.