Question

Condition for a$x^2$ + bx+ c = 0 to be a quadratic equation is

• A. a≥ 0; a, b, c are real
• B. a< 0; a, b, c are unreal
• C. a≤ 0; a, b, c are real
• D. a≠ 0; a, b, c are real.

Answer 1

The correct option is D

a≠ 0; a, b, c are real.

a$x^2$ + bx + c = 0;The coefficient of $x^2$should not be equal to zero, i.e. a$\ne$0

So now a, b, c is real and a$\ne$0, which is condition for the given equation to be quadratic.