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Question
(-1)+2+(-3)-(-2)
This is the same as -1 + 2 -3 - -2.
Note that minus a minus is a plus, so this is -1 + 2 - 3 + 2.
The order can be changed to 2 + 2 - 1 - 3.
Since the last two numbers have a minus sign,
this can be rewritten as 2 + 2 - (1 + 3).
That can be seen to be 4 - 4.
This may not have been known back in ancient history,
but now we both know that this is 0.
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Answers by Expert:
Scott A Wilson
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Any algebraic question you've got, like linear, quadratic, exponential, etc.
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solving story problems
solving linear, parabolic, and 3rd order equations
solving equations with multiple variables
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documents at Boeing
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MS at math OSU in mathematics at OSU
BS at OSU in mathematical sciences (math, statistics, computer science)
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both BS and MS degrees were given with honors
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