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-2x(x - 2y) + 3y(x - 2y)
-2x` + 4xy + 3xy - 6y`
-2x` + 7xy - 6y`
jadi....
hasil kali (-2x + 3y)(x - 2y)= -2x` + 7xy - 6y`
catatan= ` = pangkat dua
. = -2x`= min dua x pangkat dua
. = 6y`= positif enam y pangkat dua
= (-2x × x) + (-2x × - 2y) + (3y × x) + (3y × -2y)
= -2x² + 4xy + 3xy - 6y²
= -2x² + 7xy - 6y²