Question

The real roots of quadratic
equation ax2 + bx + c =0
does not exist if *
#D>0
#D< 0
#D=0
None of these​

Answer 1

Answer:

#D<0

Step-by-step explanation:

We know that,

A quadratic equation is given by,

• ax^2 + bx + c = 0

Where, a, b and c are real numbers and a≠0.

Also, we know that

Discriminant is given by,

• D = b^2 - 4ac

Now, we know that,

Discriminant tells about the nature of the roots.

For real and distinct roots, we have,

• D > 0

For real and equal roots, we have,

• D = 0

For unreal or imaginary roots, we have,

• D < 0

Hence, the real roots won't exist iff #D < 0.