乗法:(正の代数) × (正の代数)【答案】

× 2a y c 2b 2y 2c b 2x x a
b 2ab by bc 2b2 2by 2bc b2 2bx bx ab
2a 4a2 2ay 2ac 4ab 4ay 4ac 2ab 4ax 2ax 2a2
2x 4ax 2xy 2cx 4bx 4xy 4cx 2bx 4x2 2x2 2ax
2b 4ab 2by 2bc 4b2 4by 4bc 2b2 4bx 2bx 2ab
x 2ax xy cx 2bx 2xy 2cx bx 2x2 x2 ax
c 2ac cy c2 2bc 2cy 2c2 bc 2cx cx ac
2y 4ay 2y2 2cy 4by 4y2 4cy 2by 4xy 2xy 2ay
y 2ay y2 cy 2by 2y2 2cy by 2xy xy ay
a 2a2 ay ac 2ab 2ay 2ac ab 2ax ax a2
2c 4ac 2cy 2c2 4bc 4cy 4c2 2bc 4cx 2cx 2ac

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