Advanced Math practice question

Answer: 6

p(−2) = (−2)² − (−2) = 4 + 2 = 6.

Common wrong answers

If you answered 2

2 is 4 − 2, forgetting that subtracting −2 means ADDING 2.

If you answered -6

−6 comes from −4 − 2, treating (−2)² as −4; a square is never negative.

If you answered -2

−2 comes from −4 + 2, again squaring wrongly.

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 ?