Thread: X, Y value problem

Dear Group Members,

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

X + √y = 21
√x + y = 29

Thanks.

Hi.

Originally Posted by yegparkash

Dear Group Members,

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

X + √y = 21
√x + y = 29

Do you know this method:

Cramer's rule - Wikipedia, the free encyclopedia

?

Yours
Rapha

Originally Posted by yegparkash

Dear Group Members,

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

X + √y = 21
√x + y = 29

Thanks.

Rearrange & square the 2nd equation


rearranged


squared


replace x in equation


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.

Originally Posted by Rapha

Hi.



Do you know this method:

Cramer's rule - Wikipedia, the free encyclopedia

?

Yours
Rapha

Cramer's Rule can only be used for a system of linear equations. The posted system is NOT linear.