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(2x-y)(3-y) per (y-3)(x+2y)
=6x - 2xy - 3y + y² per xy + 2y² - 3x - 6y
= y²+6x-3y-2xy per 2y²-3x-6y+xy
= 1/2 y² -2x + 1/2y - 2xy
2.
10^3 (2x-3y) per -5^4 (3y-2x)
= 1.000 (2x-3y) per 625(3y-2x)
= 2.000x - 3.000y per 1875y - 1250x
= 80x - 120y per 75y - 50x
= 16x - 24y per 15y - 10x
= 16/-10x -24/15y
= - 8/5x -8/5y
Maaf, kalau salah.