Question

Решите уровнение $2 x^{2} -9x+9=0$

Answer 1

$2 x^{2} -9x+9=0 \ D=81-72=9 \ sqrt{D} =3 \ x_{1} = frac{9+3}{4} =3 \ x_{2} = frac{9-3}{4} =1.5$