16Hit 1600
Advanced MathEasyCubing a negative input

Advanced Math practice question

The function h is defined by h(x) = x³. What is the value of h(−2)?

Answer: -8

h(−2) = (−2)³ = −8: an odd power keeps the negative sign.

Common wrong answers

If you answered 8
Cubing keeps a negative sign: (−2)(−2)(−2) = −8.
If you answered -6
−6 is 3 · (−2); the rule cubes rather than triples.
If you answered -2
The input must be cubed: (−2)³ = −8.

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