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jok3333 [9.3K]
2 years ago
11

The discriminant of a quadratic equation is equal to -8, which statement describes the roots?

Mathematics
1 answer:
Maslowich2 years ago
6 0

Answer:

  (a)  There are two complex roots

Step-by-step explanation:

The discriminant of a quadratic function describes the nature of its roots:

  • <u>negative</u>: two complex roots
  • <u>zero</u>: one real root (multiplicity 2)
  • <u>positive</u>: two distinct real roots.

__

Your discriminant of -8 is <em>negative</em>, so it indicates ...

  There are two complex roots

_____

<em>Additional comment</em>

We generally study polynomials with <em>real coefficients</em>. These will never have an odd number of complex roots. Their complex roots always come in conjugate pairs.

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Answer: The SST for the data set is 8.

Step-by-step explanation:

Since we have given that

Coefficient of determination (R²) = 0.25

SSE for the data = 6

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As we know the formula for coefficient of determination:

R^2=1-\dfrac{SSE}{SST}\\\\0.25=1-\dfrac{6}{SST}\\\\0.25-1=-\dfrac{6}{SST}\\\\-0.75=-\dfrac{6}{SST}\\\\SST=\dfrac{6}{0.75}\\\\SST=8

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In the figure above, PQRS is a circle. If PQT and SRT<br>are straight lines, find the value of x.
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Given:

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To find:

The value of x.

Solution:

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Using exterior angle theorem in triangle QRT, we get

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3 years ago
A cube-shaped box has a volume of 1/8 of a cubic meter. What is the perimeter of each of its
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