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exponent problem

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by samirpandeyit62 » Tue Oct 23, 2007 9:58 pm
99,999^2 - 1^2

= (100000-1)^2 -1

= 100000^2 +1 - 200000 -1

= 100000^2 - 200000

= 100000(100000 -2)

= 10^5(10^5 -2)
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Samir
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by me4mba » Wed Oct 24, 2007 4:27 am
Or x^2 – y^2 = (x+y)(x-y). So you have (99,999+1)(99,999-1) which is (100,000)(99,998) Which is also (10^5)(10^5 – 2).
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by lawalx » Sat Nov 10, 2007 12:51 am
hi samir

where can i learn to factorize exponents like u jst did. pls hlp
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by samirpandeyit62 » Sat Nov 10, 2007 7:23 am
Hi lawalx,
I've not looked specifically into any thing for exponents but I think that Kaplan GMAT 800 is good for maths concepts.
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Samir
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