Question

2. Which of the following equations is quadratic?

(1) x² + 2x + 11 = 0
(2) x² - 2x + 5 = x²
(3) (x + 2)² = 2x²​

Answer 1

Answer:

(1) x² + 2x + 11 = 0

(3) (x + 2)² = 2x²

Step-by-step explanation:

(1) x² + 2x + 11 = 0 , degree of the polynomial = 2, hence quadratic equation

(2) x² - 2x + 5 = x², degree of the polynomial = 1, hence linear equation

(3) (x + 2)² = 2x²​, degree of the polynomial = 2, hence quadratic equation