Dear Group Members,

Can anyone help me to find out value of X & Y.

X + √y = 21

√x + y = 29

Thanks.

Results 1 to 4 of 4

- Sep 4th 2009, 05:24 AM #1

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- Sep 4th 2009, 08:55 PM #2

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- Nov 2008
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Hi.

Do you know this method:

Cramer's rule - Wikipedia, the free encyclopedia

?

Yours

Rapha

- Sep 4th 2009, 09:30 PM #3

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Rearrange & square the 2nd equation

$\displaystyle \sqrt{x} + y = 29$

rearranged

$\displaystyle \sqrt{x} = 29 - y $

squared

$\displaystyle x = (29 - y)^2 $

replace x in equation

$\displaystyle (29 - y)^2 + \sqrt{y} = 21$

You have 1 equation & 1 unknown

.

NOTE:

The sum of 2 irrational numbers is an irrational number.

For this specific problem, the square root of x & square root of y

must be natural numbers.

- Sep 4th 2009, 10:00 PM #4