Question

given f(x), evaluate f(4). f(x)=5x^2 - 5x - 1 f(4)=? simplify your answer

Explanation:

Step1: Substitute x = 4

Substitute \(x = 4\) into \(f(x)=5x^{2}-5x - 1\).
\[f(4)=5\times4^{2}-5\times4 - 1\]

Step2: Calculate powers

First calculate \(4^{2}=16\).
\[f(4)=5\times16-5\times4 - 1\]

Step3: Do multiplications

Calculate \(5\times16 = 80\) and \(5\times4=20\).
\[f(4)=80 - 20-1\]

Step4: Do subtractions

\[f(4)=60 - 1=59\]

Answer:

59