Question 1085668
1) (x + 1) / (-5x - 10) = (x + 1) / -5(x + 2)
exclude x = -2
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2) square root(4 - x)
exclude all x > 4
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3) (2 - x) / (x^2 - 5x  + 6) = (2 - x) / ((x - 2) * (x - 3))
exclude x = 2, 3
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