Algebra Practice Test 2025 – 400 Free Practice Questions to Pass the Exam

Question: 1 / 400

If f(x) = x² - 4, what is f(-2)?

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To find the value of f(-2), you start with the given function f(x) = x² - 4. This means to evaluate f at -2, you simply substitute -2 for x in the function.

So, you compute:

f(-2) = (-2)² - 4.

Calculating (-2)² gives you 4. Now, you subtract 4 from that result:

4 - 4 = 0.

This calculation shows that f(-2) equals 0, which is why this choice is the correct answer. The function represents a parabola opening upwards, and when you plug in -2, you are determining the value of the function at that specific x-coordinate.

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