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解答例
(2)2x²-3xy-2y²+5x+5y-3
=2x²+(-3y+5)x-2y²+5y-3
=2x²+(-3y+5)x-(2y²-5y+3)
=2x²+(-3y+5)x-(2y-3)(y-1)
2 \/ (y-1) = y-1
1 /\ {-(2y-3)} = -4y+6
-3y+5
={2x+(y-1)}{x-(2y-3)}
=(2x+y-1)(x-2y+3)
(5)6x²+5xy-6y²+x-5y-1
=6x²+(5y+1)x-6y²-5y-1
=6x²+(5y+1)x-(6y²+5y+1)
=6x²+(5y+1)x-(3y+1)(2y+1)
={3x-(2y+1)}{2x+(3y+1)}
=(3x-2y-1)(2x+3y+1)
ありがとうございます!