Question 15
Quadratic EquationsWhat value of g will make the expression 4x2 − 18xy + g a perfect square?
- A.9
- B.9y2/4
- C.81y2
- D.81y2/4
Show the answer and explanation
Answer: D (81y2/4)
Explanation
(2x − 9y/2)² = 4x² − 18xy + 81y²/4, so g = 81y²/4.
What value of g will make the expression 4x2 − 18xy + g a perfect square?
Answer: D (81y2/4)
(2x − 9y/2)² = 4x² − 18xy + 81y²/4, so g = 81y²/4.