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Quadratic equations

Instructions:

Solve quadratic equation and find out values of unknown variables x1 and x2.

Example

  
1.x2 - 4.x - 12=0/
=0
(x ).(x )=0
x1=
x2=

Solution

1.x2 - 4.x - 12=0
x1=-2
x2=6

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