Сколько решений х²= х+3!!!!!!!!!
x2=x+3
x2-x-3 = 0
Вычислим дискриминант D
D = b^2 - 4ac = ( – 1^)2 – 4·1·( – 3) = 13
x1 = -b + √ D/2a = 1 + √ 13/2·1=1 + √ 13/2
x2 = -b – √ D/2a = 1 – √ 13/2·1 = 1 – √ 13/2