Разложите на множители трехчлен:

помогите это решить!

1) x² + 4x + 3 = (x² + x) + (3x + 3) = x (x + 1) + 3 (x + 1) = (x + 1) (x + 3)

2) x² - 10x + 16 = (x² - 2x) - (8x - 16) = x (x - 2) - 8 (x - 2) = (x - 2) (x - 8)

3) x² + 3x - 18 = (x² - 9) + (3x - 9) = (x - 3) (x + 3) + 3 (x - 3) = (x - 3) (x+3+3) =

= (x - 3) (x + 6)

4) x² - 4x - 32 = (x² - 16) - (4x + 16) = (x - 4) (x + 4) - 4 (x + 4) =

= (x + 4) (x - 4 - 4) = (x + 4) (x - 8)