Question

Решите плэсссс : 9х^2-9х+2=0

Answer 1

$tt 9x^2-9x+2=0\\D=(-9)^2-4cdot9cdot2=81-72=9=3^2\\x_1=cfrac{9-3}{2cdot9}= cfrac{6}{18}= cfrac{1}{3}\\x_2=cfrac{9+3}{2cdot9}= cfrac{12}{18}= cfrac{2}{3}$