Question

решите уравнение 5x²+9x+4=0

Answer 1

5x^2+9x+4=0
x = (-9+-√(9^2-4*5*4)) / 5 * 2 = (-9+-√(81-80))/10 = (-9+-1)/10
x1 = (-9+1)/10 = -8/10 = -0,8
x2=(-9-1)/10 = -1

Ответ: x1= -0,8  x2 = -1