Question

Which of the following is not a quadratic equation
1) x2+3x-5=0
2) 3+ x - x2 = 0
3) x² + x3 + 2 = 0
4) x2 -9=0​

Answer 1

3) x2 + x3 +2= 0

4) x2 - 9 = 0

is not a quadratic equation

Please confirm

hope it helps you