Question

question
given $f(x) = -x^2 - 7x$, find $f(-10)$

Explanation:

Step1: Substitute \( x = -10 \) into the function \( f(x) \)

We have \( f(x) = -x^2 - 7x \), so when \( x = -10 \), we substitute it into the function: \( f(-10)=-(-10)^2 - 7\times(-10) \)

Step2: Calculate each term

First, calculate \( (-10)^2 = 100 \), so \( -(-10)^2=- 100 \). Then, calculate \( 7\times(-10)=-70 \), so \( -7\times(-10) = 70 \)

Step3: Combine the results

\( f(-10)=-100 + 70=-30 \)

Answer:

\( -30 \)