16Hit1600
Advanced MathMediumPositive value from a substitution

Advanced Math practice question

If x² = 2y and y = 8, what is the positive value of x?

Answer: 4

x² = 16, so the positive value is 4.

Common wrong answers

If you answered 8
8 is y.
If you answered 16
16 is x².
If you answered -4
−4 is the negative root.

More Advanced Math questions

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