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  Discussion about math, puzzles, games and fun.   Useful symbols: √ ∞ ≠ ≤ ≥ ≈ ⇒ ∈ Δ θ ∴ ∑ ∫ π -

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#1 2013-06-01 16:29:28

Hostible
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common mistake

Know that -a^2 means -1 x a^2 and not -a x -a.
The reason is that -a^2 has its coefficient as -1 
Therefore -a x -a = a^2 and and not -a^2.
This symbol ^ implies exponent.

Last edited by Hostible (2013-06-01 16:30:49)

 

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