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Unformatted text preview: Seven Deadly Algebra Sins
The following is a list of the most frustrating mistakes to see students make in
their work. If you commit any of these errors on a homework or quiz, not only will you get the problem wrong, but you will
1. (ab)2 = ab2 2.
3. (a + b)2 = a2 + b2
√
√
√
a+b= a+ b 4. 1
a+b = 5. a−b
b = a, 6. ln(x)
x 7. a−b = −ab lose additional points ! 1
a + 1
b and similarly, = ln a−b
b =a−1 (or any other consequence of interpreting ln(x) as ln times x) ...
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 Spring '11
 Gentimis
 Algebra

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