12x2 + 60x + 75 = ?

12x2 + 60x + 75


By using Splitting the middle term


12 x2 + 60x + 75


= 3(4 x2 + (10 + 10)x + 25)


= 3(2x(2x + 5) + 5(2x + 5))


= 3(2x + 5)(2x + 5)

12