Advanced Math practice question

Answer: 29

Substitute: f(4) = 2(4²) − 3 = 2(16) − 3 = 32 − 3 = 29. Square before multiplying — order of operations.

Common wrong answers

If you answered 5

You used 2·4 instead of 2·4², dropping the exponent entirely. Square first: 2(16) − 3 = 29.

If you answered 13

You forgot to multiply the square by 2, computing 4² − 3. It should be 2(16) − 3 = 29.

If you answered 61

You multiplied before squaring: (2·4)² − 3 = 61. Square the 4 first, then double: 2(16) − 3 = 29.

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