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long division

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Long division with decimals 2017-06-16
Kenneth pose la question :
Hello:

Why is it recommended to move the decimal from a divisor when dividing so that the divisor is a whole number? I know how to divide by moving the decimal from the divisor, but I cannot explain the reason.

I thank you for your reply.

Penny Nom lui répond.
Long division 2012-06-07
Emily pose la question :
Simplify the expression using long division (9x^2-41x-6)/(x-4)
Penny Nom lui répond.
Explaining the factoring for the difference of cubes 2008-01-16
Bill pose la question :
A student asked me where did the "difference of cubes" and "sum of cubes" come from. I did not have an answer for her. She is very bright and understands how they work but wanted to know where they derived from. Any help you can offer would be great. Thanks
Stephen La Rocque lui répond.
Simplifying a quartic rational expression using long division 2007-06-14
Megan pose la question :
x+2/12x^4+17x^3+0x^2+8x-40=
Stephen La Rocque and Penny Nom lui répond.
Some algebra 2002-05-11
A student pose la question :

/x - 2 ^4/x = 8

/ = square root sign
^ = 4th root of x

also, dividing
2x3 -3 -6x
__________
4 + 2x

the 2x3 is 2x to the third


Penny Nom lui répond.
 
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