Advanced MathHardProduct of solutions of two separate equations
Advanced Math practice question
If 3x² − 12 = 0 and 2y² = 32, where x and y are both positive, what is the value of xy?
Answer: 8
x² = 4 gives x = 2, and y² = 16 gives y = 4, so xy = 8.
Common wrong answers
- If you answered 6
- 6 is x + y.
- If you answered 16
- 16 is y².
- If you answered 64
- 64 is x²y².
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