16Hit1600
Advanced MathMediumProduct of conjugate surds

Advanced Math practice question

What is the value of (2 + √3)(2 − √3)?

Answer: 1

This is a difference of squares: 2² − (√3)² = 4 − 3 = 1.

Common wrong answers

If you answered 4
4 forgets to subtract (√3)².
If you answered 7
7 adds 4 and 3 instead of subtracting.
If you answered -1
−1 reverses the subtraction.

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