9x² = 9x-2
9x² - 9x + 2 = 0
aplicas la formula de bascara
( 9 + - raiz (81 - 4.9.2))/2
(9 +- raiz (9))/2
(9 + - 3)/2
x1 = 9+3 / 2...............x2= 9-3/2
x1= 12/2....................x2= 6/2
x1= 6.........................x2= 3
espero que te sirva, salu2!!!.