Difference of squares and perfect square trinomials Quiz Welcome to your Difference of squares and perfect square trinomials Quiz Please click "Next" Factor the following 4x² + 8x + 4 Factor the following 9x² - 4 Factor the following x² - 6x + 9 Factor the following 25n² - 4m² Factor the following 9x² - 12x + 4 Factor the following 16x² - 1 Time is Up! Time's up