Question

-4х в квадрате + 4х-1=0

Answer 1

-4х² + 4х - 1 = 0
4х² - 4х + 1 = 0
D = b² - 4ac = (-4)² - 4 * 4 * 1 = 16 - 16 = 0
x = -b/2a = -(-4)/(2 * 4) = 4/8 = 0,5