Реши квадратное уравнение 2(10x−15)^2−5(10x−15)+2=0

2(10x - 15)(10x - 15) - 50x + 75 + 2 = 02(100x² - 300x + 225) - 50x + 77 =0200x² - 600x + 450 - 50x + 77 = 0200x² - 650x + 527 0 =D = b² - 4ac = 422500 - 421600 = 900 = 30²x1 = ( 650 + 30) / 400 = 1,7x2 = ( 650 - 30) / 400 = 1,55