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42 votes
42 votes
Solve the following quadratic equation using the best method: 2x² – 8x + 9 = 0 ** Show your work!! To get a 4, you must use every method once! State which method you used.

User Sideshowbarker
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2 Answers

17 votes
17 votes

Answer:

the other guy is right

Explanation:

User Michael Thiel
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13 votes
13 votes

\begin{gathered} \text{The quadratic equation is,} \\ 2x^2-8x+9=0 \\ So,\text{ }apply\text{ the quadratic formula} \\ x=\frac{-b\pm\sqrt[]{b^2-4ac}}{2a} \\ \text{Here, a=2,b=-8,c=9} \\ So, \\ x=\frac{8\pm\sqrt[]{(-8)^2-4*2*9}}{2*2} \\ x=\frac{8\pm\sqrt[]{64-72}}{4} \\ x=\frac{8\pm\sqrt[]{-8}}{4} \\ x=2\pm(i)/(2) \end{gathered}

User Monk L
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