2 years ago

How I can answer this question, NO LINKS, if you answer correctly I'll give u brainliest!

Mathematics

1 answer:

OverLord2011 [107]2 years ago

5 0

Answer:

The answer is : A

Step-by-step explanation:

Hope this helps!!! :)

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3 years ago

Find the sum of the roots of the quadratic x^2 + 7x - 13 = 0

Hoochie [10]

Answer:

-7

Step-by-step explanation:

You use the quadratic formula of $ax^{2} +bx+c = 0$ to get:

a = 1

b = 7

c = -13

then you plug that into x= (-b ± √b²-4ac)/(2a) :

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$x=-\frac{7}{2} + \frac{\sqrt{101}}{2} \\\\x=-\frac{7}{2} - \frac{\sqrt{101}}{2}$

The sum of these two x values turns out to be:

$x=-\frac{7}{2} + \frac{\sqrt{101}}{2}+( -\frac{7}{2} - \frac{\sqrt{101}}{2} )= -\frac{14}{2} = 7$

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3 years ago

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ValentinkaMS [17]

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