式の展開２

[0]	( X +2 )( X -9)=	答えｘ X² -7X -18
[1]	( X -10 )( X -3)=	答えｘ X² -13X +30
[2]	( X -9 )( X -10)=	答えｘ X² -19X +90
[3]	( X -1 )( X +9)=	答えｘ X² +8X -9
[4]	( X +1 )( X +2)=	答えｘ X² +3X +2
[5]	( X +2 )( X -12)=	答えｘ X² -10X -24
[6]	( X +3 )( X -12)=	答えｘ X² -9X -36
[7]	( X -9 )( X +5)=	答えｘ X² -4X -45
[8]	( X +9 )( X -13)=	答えｘ X² -4X -117
[9]	( X -7 )( X +1)=	答えｘ X² -6X -7

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