tolong bgt yaa yg di buletin aja. Pakai cara

susah tulis nya
[tex] x^{2} +9x+20 = x^{2} +4x+5x+4.5 =(x+4)(x+5)[/tex]
[tex] p^{2} -8p+12 =p^{2} -6p-2p+(-6)(-2) =(p-6)(p-2)[/tex]
[tex] x^{2} -2xy+y^{2} =x^{2} -xy-xy+y.y =(x-y)(x-y)[/tex]
[tex] a^{2} -2a+15 =a^{2} -5a+3a+(-5)(3) =(a-5)(a+3)[/tex]
[tex] x^{2} -8x+12 =x^{2} -6x-2x+(-6)(-2) =(x-6)(x-2)[/tex]
yang 20 gk keliatan