Discussion about math, puzzles, games and fun.   Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ • π ƒ -¹ ² ³ °

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## Topic review (newest first)

MathsIsFun
2005-10-07 08:00:07

A baby taught us, see Multiplying Negatives

ramzi
2005-10-07 02:32:27

Clever maths people, how do you deduce (-1) x (-1)= 1

mathsyperson
2005-09-29 00:48:16

√43 - √23        √43 - √23     43 - 2√(43x23) + 23      66 - 2√989
------------- x  ------------ = ------------------------ =  -------------
√43 + √23       √43 - √23              43 - 23                      20

The math tag looks rather complex.

tilly
2005-09-18 20:44:37

cheers

MathsIsFun
2005-09-18 18:02:26

√ 2
------
3√ 3

tilly
2005-09-18 17:22:52

MathsIsFun
2005-09-17 23:01:07

As in getting rid of radicals in the denominator?

tilly
2005-09-17 21:42:17

hey, i was wondering if you could show me how to rationalise the denomiators on a couple of these, in easy steps.
1
----
√ 2

√ 2
------
3√ 3

√ 43 - √ 23
-------------
√ 43 + √ 23