Mathematics
Senior High
(3)と(4)を教えてください！
次の式を因数分解せよ。
(1)
x²+xy+2y-4
(3)
a³+ab-ac² + bc
(2) x³+x²y+x²+xy-2x-2y
(4) x² + y²+xz-yz-2xy
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