Question

which of the following quadratic eqations do not have real roots?​

Answer 1

Answer:

The quadratic equation ax

2

+bx+c=0 has no real roots only when discriminant D<0

D=b

2

−4ac<0

A) x

2

+4x+3

2

=0

Here,

D=(4)

2

−4×3

2

=16−16.97<0

B) x

2

+4x−3

2

=0

Here,

D=(4)

2

−4×(−3

2

)

=16+16.97>0

C) x

2

+5x+3

2

=0

Here,

D=(5)

2

−4×(3

2

)

=25−16.97>0

D) 3x

2

+4

3

x+4=0

Here,

D=(4

3

)

2

−4×3×4

=48−48=0

Hence, option A.

Step-by-step explanation:

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