Question

out of the following equation which one is a quadratic equation ​

Answer 1

Answer:

can be written as 5 x 2 − 90 + 0 = 0 So, 5 x 2 − 90 + 0 is a quadratic equation. 2x – x2 = x2 + 5 can be written as 2 x 2 − 2 x + 5 = 0 So, it also forms a quadratic equation. Hence, the correct answer is x2 + 4x = 11 + x2.