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Given: f(x)=-4x^2+23. What is the value of f(-5)

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Final answer:

To find the value of the function f(x) = -4x^2 + 23 at x = -5, substitute -5 into the function and simplify to get f(-5) = -77.

Step-by-step explanation:

The student asked for the value of the function f(x) = -4x^2 + 23 when x = -5. To find this value, we simply substitute -5 into the function:

f(-5) = -4(-5)^2 + 23

f(-5) = -4(25) + 23

f(-5) = -100 + 23

f(-5) = -77

Therefore, the value of f(-5) is -77.

User Antun Tun
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