Answer:
The answer is D im pretty sure
<u>Answer</u>
= -24
<u>Explanation</u>
The discriminant helps us determine the nature of the roots of a quadratic equation
When using the quadratic formula the find the roots of a quadratic equation, the term (b²-4ac) is known as the discriminant.
Where b ⇒ coefficient of the 2nd term
a ⇒ coefficient of the 1st term
c ⇒ the 3rd term.
In the equation 3x²-6x+5, the discriminant is;
(-6)² - (4×3×5) = 36 - 60
= -24
The common difference on the sequence is -3 and the number of books will be 21.
<h3>How to illustrate the sequence?</h3>
The formula that can be used to calculate the number of books will be:
= a + (n - 1)d
= 57 + (13 - 1)-
= 57 + (12 × -3)
= 57 - 36
= 21
Also, from the information given, each row has three fewer books than the row below it. Therefore, the common difference is -3.
Learn more about sequence on:
brainly.com/question/1275192
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A ray is a defined term because it has no width or depth is described using an undefined term has an informal definition travels forever in one way