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sqrt(5x^2-20x+21)+sqrt(3x^2-12x+28)=8x-2x^2-3 equation

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Numerical solution:

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The solution

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\/  5*x  - 20*x + 21  + \/  3*x  - 12*x + 28  = 8*x - 2*x  - 3
$$\sqrt{3 x^{2} - 12 x + 28} + \sqrt{5 x^{2} - 20 x + 21} = - 2 x^{2} + 8 x - 3$$
Rapid solution [src]
x1 = 2
$$x_{1} = 2$$
Sum and product of roots [src]
sum
0 + 2
$$0 + 2$$
=
2
$$2$$
product
1*2
$$1 \cdot 2$$
=
2
$$2$$
2
Numerical answer [src]
x1 = 2.0
x1 = 2.0