Answers

2014-10-13T16:00:11+08:00
X² - 9x + 6 = 0
since we can't find the answer using simple factoring in this then we'll use quadratic formula given as
x =  \frac{-b (+-)  \sqrt{b^2-4ac} }{2a}
substituting you'll have:
x =  \frac{-(-9) (+-) \sqrt{(-9)^2 -4(1)(6)} }{2(1)}
x =  \frac{9(+-) \sqrt{81-24} }{2}
x =  \frac{9 (+-)  \sqrt{57} }{2}
x_1 =  \frac{9 -  \sqrt{57} }{2}
or x1 = 0.725
x_2 =  \frac{9+ \sqrt{57} }{2}
or x2 = 8.275
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