Advanced Math practice question

Answer: A. −5

x² = 25, and the negative square root of 25 is −5.

Why the other answers are wrong

B. 5

5 squared is 25, but x must be negative.

C. −25

−25 squared is 625, not 25.

D. 25

25 is x², not x.

More Advanced Math questions

• Easy
  If f(x) = 3x − 7, what is the value of f(5)?
• Easy
  What are the solutions to x² − 9 = 0?
• Easy
  Which of the following expressions is equivalent to x² + 7x + 12 ?
• Easy
  The function g is defined by g(x) = x³ + 2x. What is the value of g(−2) ?
• Easy
  For x > 0, which of the following is equivalent to ∛(x⁵) ?
• Easy
  The function h is defined by h(x) = (x − 6)(x + 2). What is one value of x for which h(x) = 0 ?