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yungdaggerdic4543

03.08.2020

Geography

B. $\frac{5+\sqrt{37} }{6}$

D. $\frac{5-\sqrt{37} }{6}$

Explanation:

Given expression:

3x² - 5x -1 = 0

The quadratic formula is;

x = $\frac{-b +/- \sqrt{b^{2} -4ac} }{2a}$

a = 3

b = -5

c = -1

Insert the parameters:

x = $\frac{-(-5)+/-\sqrt{-5^{2} - 4(3)(-1) } }{2(3)}$

x = $\frac{5 +/- \sqrt{25 + 12} }{6}$

x = $\frac{5 +/- \sqrt{37} }{6}$

So;

x = $\frac{5+\sqrt{37} }{6}$ or $\frac{5-\sqrt{37} }{6}$

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