if x,y,z are real and different and u= x^2+4y^2+9z^2-6yz-3zx-2xy, then u is always
1) non-negative
2)zero
3)non positive
4) none of these
give explanation also
Answers
Answered by
2
The answer will be 1)Non-negative.
Put any value for example 1, 2 and 3 as x, y and z. The answer will always be positive as the squares of nos. are always positive.
Put any value for example 1, 2 and 3 as x, y and z. The answer will always be positive as the squares of nos. are always positive.
Similar questions