Question

The sum of squares of three numbers is 138, while the sum of their products taken at a time is 131. their sum is:​

Answer 1

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 .....