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(x-10) (x+1)
caranya cari angka yang di tambah hasilnya -9x dan di kali hasilnya -10
cara ini berlaku utk smuanya
(x - 10) (x-1)
b) x" + 8x - 20
(x+10) (x-2)
d) b"-8b-48
(b-12) (b+4)
e) x"+8xy-20y"
(x+10) (x-2y)