173k views
0 votes
Given the function f(x) = -5x²-x+ 20, find f(3).
O-28
O-13
O62
O64

1 Answer

6 votes

Answer:
\Large\boxed{First~Choice.~-28}

Explanation:

Given function expression

f(x) = -5x² - x + 20

Requirement of the question

Find the value of f(3)

Substitute the values into the function

f(x) = -5x² - x + 20

f(3) = -5(3)² - (3) + 20

Simplify the exponents

f(3) = -5(9) - 3 + 20

Simplify by multiplication

f(3) = -45 - 3 + 20

Simplify by subtraction and addition

f(3) = -48 + 20


\Large\boxed{f(3)=-28}

Hope this helps!! :)

Please let me know if you have any questions

User Gandarez
by
7.4k points