Question

Evaluate the expression for m = –1.2 and n = –8.4.

Write your answer as a decimal or whole number.

–16m2 − n =

Answer 1

To evaluate the expression \(-16m^2 - n\) for \(m = -1.2\) and \(n = -8.4\), we follow these steps:

1. Calculate \(m^2\):
\[
m^2 = (-1.2)^2 = 1.44
\]

2. Calculate \(-16m^2\):
\[
-16m^2 = -16 \times 1.44 = -23.04
\]

3. Substitute \(n\) into the expression:
\[
-n = -(-8.4) = 8.4
\]

4. Combine the results:
\[
-16m^2 - n = -23.04 + 8.4 = -14.64
\]

Thus, the value of the expression \(-16m^2 - n\) for \(m = -1.2\) and \(n = -8.4\) is:
\[
\boxed{-14.64}
\]