Question # 1

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If b²-4ac<0, then the roots of ax²+bx+c=0 are:

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Irrational

Rational

Imaginary

None of these

The discriminant of 2x²-7x+1= 0 is:

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41

45

43

47

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If b²-4ac>0 and is a perfect square, then roots are:

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Rational and equal

Rationaland unequal

Irrationaland equal

Irrationaland unequal

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-1

If b²-4ac < 0, then roots are:

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Unreal

Imaginary

Real

Unequal

The expression "b²-4ac" of a quadratic equation is called:

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Determinant

Redicand

Discriminant

Index

The nature of roots depends on the value of:

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-b+4ac

b²+4c

b²-4ac

-b+4ac²

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2

1

7-7h = 0, then h = :

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7

1

0

49

The discriminant of x²-3x+3=0 is:

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-3

3

-2

2

Find k, if the roots are equal in (k+3)x²-2(k+1)x-(k+1)=0:

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2, -1

-2,-1

-2,1

2,1

Sum of the roots of the equation 3x²-5x+7=0:

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5+3

5³

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