faktorkan: 1.5x²+20x ,2.x²+16x+21 ,3.x²+7x+6

[tex]5x^{2} + 20x = 5x(x + 4) \\ x ^{2} + 16x = x(x + 16) \\ x^{2} + 7x + 6= (x + 1)(x + 6)[/tex]
semoga membantuuu......