Advanced Math practice question

Answer: 3

x² = 9, so x = 3.

Common wrong answers

If you answered 1

1 gives 1 − 4 = −3.

If you answered 9

9 is x², not x.

If you answered -3

−3 also works but is not positive.

More Advanced Math questions

• Easy–Medium
  If f(x) = 2x² − 3, what is f(4)?
• Easy–Medium
  Which expression is equivalent to (2x³)(3x⁴)?
• Easy–Medium
  What are the solutions to x² − 16 = 0?
• Easy–Medium
  Which expression is equivalent to (x + 5)²?
• Easy–Medium
  For x ≠ 0, which expression is equivalent to (x² + 3x) / x?
• Easy–Medium
  What are the solutions to the equation 2(x − 3)² − 32 = 0 ?