z remains undefined.
9z-5z = 30+z 3z = 30 z = 10
y=84-72=12 z=84-52=32 x=84-12-32=40
Z2 - 5Z + 4 = 0 (Z- 1)(Z - 4) so, Z = 1 ---------- and Z = 4 -----------
(1/x) + (1/y) + (1/z) is a minimum value when x=y=z=10. Symmetry gives either maximum or minimum value.
2z
Z= -1
z remains undefined.
9z-5z = 30+z 3z = 30 z = 10
y=84-72=12 z=84-52=32 x=84-12-32=40
Z2 - 5Z + 4 = 0 (Z- 1)(Z - 4) so, Z = 1 ---------- and Z = 4 -----------
(1/x) + (1/y) + (1/z) is a minimum value when x=y=z=10. Symmetry gives either maximum or minimum value.
Z is a constant variable in this equation. A constant variable is a variable, the value of which can never change. In this case, z would be equal to 7.
Expand z plus 11 times z plus 11 = (z+11)(z+11) = z2 + 22z + 121.
6z + 28 = 12z + 10 18 = 6z 3 = z
True
It is 5x+y