Question

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

Answer 1

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}`

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