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x^2-4*x+5=sin(pi*x/4) equation

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Numerical solution:

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The solution

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 2                /pi*x\
x  - 4*x + 5 = sin|----|
                  \ 4  /
$$\left(x^{2} - 4 x\right) + 5 = \sin{\left(\frac{\pi x}{4} \right)}$$
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Numerical answer [src]
x1 = 2.0000009209495
x2 = 1.99999919844599
x3 = 2.0
x3 = 2.0