# Which function below is the inverse of f(x) = x^{2} - 25?

x squared over 25

±square root of the quantity x plus 25

±5 times the square root of x

1 over quantity x squared minus 25

**Solution:**

Given function is

f(x) = x^{2} - 25

Let y = x^{2} - 25

x^{2} = y + 25

x = ± √(y + 25 )

Swap the variables, we get y = ±√(x + 25)

Therefore, the inverse of the given function is ±√(x + 25)

## Which function below is the inverse of f(x) = x^{2} - 25?

**Summary:**

The expression ±square root of the quantity x plus 25 function is the inverse of f(x) = x^{2} - 25.

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