3 years ago

The quadratic equation x2 + mx + q = 0, where m and q are real numbers, has the complex root a + bi.?

1 answer:

3 0

Remember the quadratic formula determinant?
If b^2 -4ac < 0, a complex root exists.

So for this problem, m^2 - 4q is the determinant, and if less than 0, is complex.

So a=-m/2 and b=(1/2)SQRT(m^2 - 4q)

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A knife is three times the cost of a spoon. 9 spoons and 12 knifes cost ?82.80 workout the cost of 1 knife.

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Let S = spoon

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Read 2 more answers

In a race, there are 20 runners. Trophies for the race are awarded to the runners finishing in first and second place. In how ma

andrew11 [14]

Answer:

<u>There are 380 ways that 1st and 2nd place can be determined in the race</u>

Step-by-step explanation:

There are 20 possibilities for determine the 1st place

There are 19 possibilities for determine the 2nd place

Number of ways that 1st and 2nd place can be determined = 20 * 19

Number of ways that 1st and 2nd place can be determined = 380

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