x^2 = 4x + 1
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Originally Posted by Joker37 x^2 = 4x + 1 Rearranging, you should get $\displaystyle x^2-4x-1=0$. To solve, you need to use the quadratic formula : $\displaystyle x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}$
Can you show me how to solve the quadratic equation using completing the square?
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