Question 48
Quadratic EquationsThe truth set of 8 + 2x − x2 = 0 is {p, q}. Evaluate p + q.
- A.−6
- B.−2
- C.2
- D.4
Show the answer and explanation
Answer: C (2)
Explanation
x² − 2x − 8 = 0 gives (x − 4)(x + 2) = 0, so the roots are 4 and −2 and p + q = 2.