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vesna_86 [32]
3 years ago
6

The roots of x 2 - 2x - 2 = 0 are 1±√3 1±√12 no real roots

Mathematics
1 answer:
sertanlavr [38]3 years ago
7 0

Answer:

1±√5

Step-by-step explanation:

\bf x^2-2x-2=0\Rightarrow x=\displaystyle\frac{-(-2)\pm\sqrt{(-2)^2-4*2*(-2)}}{2}\Rightarrow\\\\\Rightarrow x=\displaystyle\frac{2\pm\sqrt{4+16}}{2}=\displaystyle\frac{2\pm\sqrt{20}}{2}=\displaystyle\frac{2\pm2\sqrt{5}}{2}\Rightarrow\\\\\Rightarrow \boxed{x=1\pm\sqrt{5}}

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4 0
3 years ago
You may use a calculator to complete this test. if 1 egg and 1/3 cup of oil are needed for each bag of brownie mix, how many bag
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