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

Question

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: \[ \boxed{-14.64} \]