Jawabanmu

2014-08-18T22:07:29+07:00
X² - xy - 2y² + 2xy + 5y - 5xy + 4y² -8y = x² + 2y² - 3y - 4xy

x²+2y²-3y-4xy - 2x²-3xy-y² = -x²-7xy+y²-3y

1 5 1
Jawaban paling cerdas!
2014-08-18T22:08:37+07:00
2x^2 + 3 xy + y^2 - (x^2 - xy - 2y^2 + 2xy + 5y - 5xy + 4y^2 - 8y)
= 2x^2 + 3 xy + y^2 - (x^2 - 4xy - 3y + 2 y^2)
= 2x^2 + 3 xy + y^2 - x^2 + 4 xy + 3y - 2 y^2
= x^2 + 7 xy + 3y - y^2
2 5 2