Разложите на множители трехчлен: это !

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)