Question

*Which of the following is not a quadratic equation?*

1️⃣ x² + 3x – 5 = 0
2️⃣ x² + x³+ 2 = 0
3️⃣ 3 + x + x² = 0
4️⃣ x² – 9 = 0​

Answer 1

Answer:

1️⃣ x² + 3x – 5 = 0

2️⃣ x² + x³+ 2 = 0

3️⃣ 3 + x + x² = 0

4️⃣ x² – 9 = 0