Question 15
Quadratic EquationsWhat must be added to x2 − 22x to make it a perfect square?
- A.11
- B.121
- C.36
- D.13
Show the answer and explanation
Answer: B (121)
Explanation
Add the square of half the coefficient of x: (22/2)² = 121.
What must be added to x2 − 22x to make it a perfect square?
Answer: B (121)
Add the square of half the coefficient of x: (22/2)² = 121.