Question

9х²-30х+25=0
Срочно нужно

Answer 1

D = b² - 4ac, D = (-30)² - 4 * 9 * 25 = 900 - 900 = 0.
x = -b/(2a).
x = -(-30)/(2 * 9) = 30/18 = 5/3.