Respuesta :

                 _                _
1. x = (-8-√12)/2 = -4-√3 = 5.732

2. x_2=-3.606

    x_1=3.606

3. b_2=-1.323

    b_1=1.323

4.  z =(-28-√72)/2=-14-3√ 2 = -18.243
     z =(-28+√72)/2=-14+3√ 2 = -9.757


Feel free to correct me if wrong!

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