Question

2. Which of the following equations is quadratic ?
(1) x2 + 2x + 11 = 0
(2) x2 - 2x + 5 = x
(3) (x + 2)2 = 2x2​

Answer 1

Answer:

First option is quadratic equation

Answer 2

Answer:

1) X2+2x +11=0, it is a quadratic equation

2) x2-2x+5=x it is not a quadratic equation

3) (x+2)2=2*2 it is not a quadratic equation

I hope it helps you