Question

Evaluate the expression for r = 2.

11r^2 − 5 =

Answer 1

To evaluate the expression \(11r^2 - 5\) for \(r = 2\), follow these steps:

1. Substitute \(r = 2\) into the expression:
\[
11(2)^2 - 5
\]

2. Calculate \(2^2\):
\[
2^2 = 4
\]

3. Substitute this back into the expression:
\[
11(4) - 5
\]

4. Multiply \(11\) by \(4\):
\[
44 - 5
\]

5. Finally, subtract \(5\) from \(44\):
\[
44 - 5 = 39
\]

Thus, the value of the expression for \(r = 2\) is \(\boxed{39}\).