tolonggg plisss yg di lingkarin aj tolong ya

12x = 12 * x

12x / 4 = 12 * x / 4 = 12 / 4 * x = 3x

15pq = 15 * p * q

3p = 3 * p

15pq / 3p = 5q

16a^2b = 16 * a * a * b

16a^2b / 2ab = 8a

(3a + 6) (2a - 6)
= (3a * 2a) + (3a * -6) + (6 * 2a) + (6 * -6)
= 6a^2 - 18a + 12a - 36
= 6a^2 - 6a - 36

(3 - 2x) (4x - 8)
= (3 * 4x) + ( 3 * -8) + (-2x * 4x) + (-2x * -8)
= 12x - 24 - 8x^2 + 16x
= 12x + 16x - 8x^2 - 24
= 28x - 8x^2 - 24