To find the value of f(x) = x² + 4 at certain points, you simply need to substitute the given values into the function.
a) For f(5):
- Substitute x = 5 into the function f(x) = x² + 4.
- f(5) = 5² + 4
- f(5) = 25 + 4
- f(5) = 29
Therefore, f(5) = 29.
b) For f(-5):
- Substitute x = -5 into the function f(x) = x² + 4.
- f(-5) = (-5)² + 4
- f(-5) = 25 + 4
- f(-5) = 29
Hence, f(-5) = 29.
