Question

1. if $f(x) = x^2 - 2x$, find $f(4) + 3$.

Explanation:

Step1: Calculate \( f(4) \)

Substitute \( x = 4 \) into \( f(x)=x^{2}-2x \). So \( f(4)=4^{2}-2\times4 \). Calculate \( 4^{2}=16 \) and \( 2\times4 = 8 \), then \( f(4)=16 - 8=8 \).

Step2: Calculate \( f(4)+3 \)

Add 3 to the result of \( f(4) \). So \( f(4)+3 = 8 + 3=11 \).

Answer:

11