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tia_tia [17]
3 years ago
10

How can you tell when a quadratic equation has two identical, rational solutions?. a:when the radicand is negative. b:when the r

adicand is not a perfect square. c:when b in the quadratic formula is greater than the radicand. d:when the radicand equals zero
Mathematics
2 answers:
sergey [27]3 years ago
4 0
"When the radicand equals zero" is the one among the following choices given in the question that you can tell when <span>a quadratic equation has two identical, rational solutions. The correct option among all the options that are given in the question is the fourth option or option "d". I hope the answer has helped you.</span>
Deffense [45]3 years ago
4 0
<h2>Answer:</h2>

The  quadratic equation has two identical, rational solutions:

d:      when the radicand equals zero.

<h2>Step-by-step explanation:</h2>

We know that the general quadratic equation of the type:

ax^2+bx+c=0

The solution is given by:

x=\dfrac{-b\pm \sqrt{D}}{2a}

with discriminant:

D=b^2-4ac

has:

  • Two rational and identical solution if the radicand i.e. D is equal to zero.
  • Two rational and unequal solution if the radicand i.e. D is strictly greater than zero.
  • Two imaginary solution if the radicand i.e. D is strictly less than zero.

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