If x+y+z = 13 and x^2+ y^2 + z^2 = 69, then The value of xy + z(x+y)...??
Yes...now understood.....thanx divya
squaring both side
There is nothing bus divert kiya gya h is que me....when u see the que u will get ....
Now open the square formula of (x+y+z)^2......
and put all the known values we will get the ans
Yes..u rgt...explain plzzzz