Which of the following equations has roots that are both real and equal?

Home / Mathematics / Algebra / Quadratic Equations

Basic Operations & Factorization

Linear Equations

Quadratic Equations

A. x² - 4x + 4 = 0

B. x² + 2x + 3 = 0

C. x² - 3x + 2 = 0

D. x² + x + 1 = 0

E. None of the above

Answer: A. x² - 4x + 4 = 0

A quadratic equation has real and equal roots if the discriminant (b² - 4ac) is zero. For x² - 4x + 4, the discriminant is 0.

Posted in: Quadratic Equations - Algebra - Mathematics