Разложите на множители трёхчлен:

1) x^2+4x+3

3) x^2+3x-18

A * (x^2) + b*x + c = a * (x - x1) * (x - x2)

1) x^2 + 4x + 3 = 0

x1 = - 3

x2 = - 1

x^2 + 4x + 3 = (x + 3) * (x + 1)

3) x^2 + 3x - 18 = 0

x1 = - 6

x2 = 3

x^2 + 3x - 18 = (x - 3) * (x + 6)