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(a-2)(a-3)=0
a1=2 dan a2=3
coba cari perkalian yang hasilnya 6 tetapi jika dijumlahkan hasilnya -5
-2 x -3 = 6
-2 + -3 = - 5
-2+(-3)=(-5)
-2x(-3)=6
=a2-5a-6
=(a-2) (a-3)
a-2=0 atau a-3=0
a=2 a=3