The sum of squares of three numbers is 138, while the sum of their products taken at a time is 131. their sum is:
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x²+ y²+ z² = 138
xy +yz +zx = 131
now using formula ...
(x +y+z ) ² = x² + y² + z² _ 2xy _ 2yz _ 2zx ...
2 ko common lo ,
values put kro n solve ...
vaisai to account del. kiyaa hai ............maiko pts mil gyai .....
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