Mathematics, 25.01.2021 14:00 deb64

Which of the following is true? xy–y–x+1 = (1+x) (1–y)
xy–y–x+1 = (x–1) (y–1)
xy–y–x+1 = (1–x) (y–1)
xy–y–x+1 = (x–1) (1–y)

plz fast

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Which of the following is true? xy–y–x+1 = (1+x) (1–y)
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xy–y–x+1...

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Which of the following is true? xy–y–x+1 = (1+x) (1–y) xy–y–x+1 = (x–1) (y–1) xy–y–x+1 = (1–x) (y–1) xy–y–x+1 = (x–1) (1–y) plz fast

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Another question on Mathematics

Which of the following is true? xy–y–x+1 = (1+x) (1–y)
xy–y–x+1 = (x–1) (y–1)
xy–y–x+1 = (1–x) (y–1)
xy–y–x+1 = (x–1) (1–y)

plz fast